The perverted old man trope barely happens anymore, so saying you're sick of it means you need to branch out and watch more anime than just dragonball.
Rihito just can't catch a break. I just feel bad for him at this point. Assigned jobber since birth by the author.
I should start assuming that whoever I think is going to win in this tournament arc is going to lose.
Martial Artists that aren't teaching usually retire in their 30-40s anyways due to injuries.
So even if you start in your 20s, there's always time to be crippled by your 30s!