What to do after "unbiblical" divorce?

I, 31M had divorced my wife 32F at the time about 4 months ago (no kids). We had only been married for 1 year. We got married with the wrong intentions and I later found out that she was not a believer despite her initial profession when we were dating. Immediately after getting married to her I knew something was wrong because she told me that she had a lot of outstanding debt she "forgot" to tell me about. I felt like I was tricked but I made my vows and helped pay off her debts in full. We tried to enjoy our marriage but uneasy things came up here and there that made me doubt her love and devotion. She was terrible with money, adopted a dog that had many conditions, and was abused without my knowledge. She got attacked by said dog but refused to rehome the dog and tried to help it. When I had a good job offer during the holiday season that was across the country, she refused to move despite it being good for us. She did not want to be led and proposed unreasonable ideas of living with her parents since we were short on money due to her choices. I told her we needed this job to make ends meet and I took the offer.

While I was at her parent's house over xmas, her brother's guard dog, cane corso, attacked me. Both her parents and her downplayed my injuries and tried to convince me not to go to the hospital since I would need to report the bite. I told them I needed to get treated and she broke down and told me not to go so against my better judgement I stayed the night. In the morning she refused to take me to the hospital until I told her I was going with or without her. Her stopped for snacks and coffee, then left me alone in the ER waiting room telling me that she didn't want to be there with me because she was still upset with me over the job. I felt so abandoned for 6 hours. She came at the end to be with me but I felt like she didn't care about me. When we finally went back home she tried to get a cage for the dog so I would feel safe but she kept yelling at me to help her set it up when I wanted to get some rest, not being able to sleep properly the last few days. Eventually I cracked and told her I was flying home to my parent's house to spend xmas with them. She went crazy and made up various threats which I ignored. False threats that she was pregnant and that I was abandoning our child and that she would prevent me from seeing the child (I was only leaving for a week or so) were made. She most likely has BPD or some sort of mental condition but her abusive words really affected me. After the holidays, she apologized but I asked her to go to therapy with me to resolve these issues. She didn't want to fix them and didn't think it was that important, turning the blame back on me because I accepted the job offer.

I told her I needed some space to think about how she was acting but she went back into a fit and tried to throw my things out of the house and screamed at me to leave. I was afraid of her so I flew home to my parents and they were upset she was treating me this way. I filed for divorce to show her that I was serious and that I needed serious change from her for the marriage to work. I understand that this was a wrong way of using divorce but it triggered a lot more underlying issues that were hidden, convincing me that divorce might've been the safer decision. After I filed for divorce I told her that she needed to rehome her adopted dog since it had attacked her 3 more times. It was a danger to the both of us. She refused and told me that she would get a restraining order on me and falsely charge me for rape if I tried. That if I touched her dog, she would kill herself and blame me for it. Afterwards, she even sent me a message saying that she took all her pills to overdose herself so I called the police to do a wellness check. All these forms of manipulation really destroyed the trust between us and every day I felt my mental health deteriorating. I pursued the divorce and tried to convince her to go to therapy with me, initially biblical counseling but later on a secular therapist. She kept refusing saving that I was the one with all the problems. I told her that "this isn't a marriage anymore". A few weeks later she sent me a message telling me that she had been on many dates and had great sex. That I should move on because she had. This hurt me deeply and made me feel like there was no point in trying to reconcile at this point as the divorce finalization deadline approached. a few weeks before the finalization date she said that the message was just to hurt me and that she didn't really do it. During that period I had researched a lot more on mental health and BPD and being promiscuous could be one of the symptoms. I didn't trust her at that point.

I let the divorce finalize but had a difficult time coming to terms if it was biblical or not. My church told me that they wished things could've been handled through them so that they could help me discern but I was so focused on my pain and she was unwilling to participate regardless. I know divorce on biblical grounds is abuse, abandonment, and adultery (baptist). She has since then, found another partner and is living with him, often rubbing how much better he is in my face. I still love her despite everything she has done but I don't see a future of reconciliation between us. I don't know my path forward. If I'm to remain single until she has remarried or if her sexual sins have fully broken the covenant and have allowed me to remarry. My church told me that it is unclear since the only evidence of adultery is from her messages and there's no concrete proof since she is manipulative and unstable. I don't know if this is being too legalistic but it did not sit right with me. Yes, we're divorced so her having a sexual relationship right now may be viewed as fornication instead of adultery and that's what confuses me. It feels wrong how she can move on with her life and I'm trapped in singleness.

TLDR: Emotionally abusive wife made legal threats, threats to her life, and sent messages admitting to her adultery. I divorced her but I do not know if it is biblical to pursue another relationship and remarry. Church elders have told me to remain single as there is not enough concrete evidence due to her unstable nature to know for sure that remarriage is an option until she remarries herself. She has since moved in with another man and has rubbed her sexual sins in my face.