Instead of focusing on not davening, try to focus on gratitude. It’s a process. You’ve had what seems like negative experiences happen to you (btw, they happen to everyone). The process is to focus on those things that are going right/correctly in your life.
Find that half-full glass. Once you do, joie-de-vivre kicks in automatically. And so does bitachon that whatever Hashem has dealt you is inevitably in your best interest.
Can’t wait to see when you are truly HAPPIEST!