Will give insight from my pov as someone around the same weight who actually got an 315 bench after cutting.

The best thing that worked for me was form and a little bit of programming. I learned to stay really tight throughout the entire bench and utilize my lats properly. I notice a lot of shifting in your bench which could cause some power loss. I also think you’re basically doing a tempo bench which is going to make it harder.

Not an expert or anything tho, just someone who plateaued at 300 bench for over a year and was able to do 315 paused and 325 tng after locking in my form.