Can’t Figure Out What’s Missing in My Design—Thoughts?

Hello! I’ve been struggling a lot with my designs lately, so I thought I’d share this here. This is something I drew recently, but I feel like there’s something off about it… The problem is, I can’t quite pinpoint what it is. What do you think feels a bit lacking? I want to create something that feels more appealing and has that popular, mainstream vibe, but it’s harder than I thought 😭