>>77547832Stop grinding to failure.
If you're struggling with 90kg, then your reps at 80kg are probably grindy as hell also.
Bench at least twice a week and drop the weight significantly.
Day one (lets say monday), do 2 sets of 5, with around 5 reps left in the tank. Yes it will be very very easy. For you that might be somewhere around 50-60kg.
Then do a back off set with even more reps left in the tank e.g. 8 reps left. That might be 30 - 40kg or something.
Hammer some chest and tricep accessories. 1/2 exercises each. Whatever you like. I like pec deck flyes and single arm tricep pushdown.
Then on day 2 e.g. thursday, do the exact same thing but with 2x3 and a slightly heavier weight e.g. 2.5 - 5kg more than monday.
Then each week add 5kg. When you start to fail or the reps get very grindy, reset back to your original week 1, day 1 weight + 2.5 - 5kg