Bottom set, ugly board

If you are going to bet OTR I think you should bet a bit bigger OTT and just shove river. But on this board I'm not sure I want to invest my whole stack.

This depends a lot on villain but against unknown I think check folding would be an option. I don't know if ppl will bluff OTR very often, and if he had a draw at some point he probably has hit it now. There are a lot of better sets, straights and flushes possible. Your set, which was strong OTF, turned into a bluff catcher. And I'm not sure if it is strong enough to check call.

As played OTR you maybe could make an exploitative fold. Because when he plays like this he always has the nuts. You have to win this only 13% of the times and it is ridiculous to fold but maybe I would still do it ♦

otr is just a bad sizing. why are you just not shipping or check/folding?
xf seems fine, or bet super small like 10 BB or something

X/c otr

there are a lot of options anf i guess non of them are a really big mistake.

my line would have been to bet/fold small otr. like 24bb or somthing

Against fish I agree with betting OTR, but this villain doesn´t seem to be mad, so I would choose c/c.

I would raise much higher, because if he call the raise on this board he will call mich higher raise. Otherwise when he has nothing he folds also to small raises. River i will fold because there are not to many hands we can beat. One/2 pair hands he will probably check call.