Have you tried high volume style training?
And as far as what you do now, what’s your preferred rep range?
I prefer low volume, I alternate between full body 3x per week, PPLPPL, and bro split.
Usually target all ranges, so if I do a arms day tris would be
Dips weighted 3x6-10
Skull 3x12-15
Cable Press 2x15-10 or make it 1 set of say 20-30 RP
