Lost in the sauce

I've hit a block with my campaign that's been going two years. I've grown as a DM. We have had players come and go, a tpk, player issues derailing or halting the entire game, DM mistakes and bad calls from myself.

I feel all the corrections and improve I've needed to make to cover for all this has got me into such a convoluted space that I'm struggling to get through it.

I don't wanna just end it, with so many years in, so much work and being so close to an end but I just don't know how to get there anymore.