Stuck in 2k MMR

Hi support player here.

Am I the only one that has 3k hours, been playing since 2013 and my peak is archon 4.

I review my games, get my immortal friends to review and give feedback. I watch guides made by pros etc I practice with few heroes (4/5)

The things I don’t do - Captain the team of what we should do Have a coach that would watch game in real time.

Sometimes I watch my replays and wonder what else I could do. I stack, pull, create space, secure range creeps, supp mid at min 6, wisdom at 7 and all other boring support stuff.

What else can I do? Any tips would be welcome. Thanks

P.S I dropped to archon 1 during Christmas (bad games) I am now on 7 win streak and approaching archon 3.