Congrats you're human
Here's some things I would think about:
1. go to a standard setup (normal weight arrow, 3 or 4 blade broadhead, no fancy inserts/outserts, normal pin sight of 1 to 3 pins, handheld laser rangefinder)
2. you've learned a lot from outside sources, but maybe you've learned enough to make yourself more your point of origin.....as a confidence thing....but continue to learn of course
2. start shooting 3D but don't obsess about score, try to make it as applicable to hunting as possible
3. don't stop shooting does
Related to point 3, once I got better at getting on mature bucks, shooting does started losing its shine (especially after a back injury and now part of my decision is "do I want the pain and risk of getting a doe out of here"....but you can mitigate that by where you'll shoot a doe on the landscape). I also wouldn't shoot smaller bucks. This resulted in seasons where I didn't even pull back my bow. When I did draw, I was out of practice and it seemed like way bigger of a deal than it actually was. So, I've decided I have to keep taking does to stay tuned up. I'll give the meat away to hunters for the hungry or other people if necessary. None of it will go to waste.
I missed every deer I shot at from age 15 to 18 because of nerves until one day a doe jumped out unexpected and I shot it without thinking too much. That ended that bad streak.
4. I have mantras I repeat on stand and I also visualize my potential shots (and range find to those spots while waiting and make a game out of memorizing at least 6 yardages to useful landmarks). These mantras include "smart, slow, silent" and "finger behind the trigger, stop the deer, pick your spot".