My overall River AF is 5.28.
Small Blind River AF 20, that's extremely high, big leak.

I have a big mental leak to give up a hands where I have invested a lot.
Also, I think I make too many blocking bets on the River to avoid opponents bluffing me.

Give me ideas on what kind of topics should I study and what kind of filters to use to find problem hands for hand analysis (especially SB, this is my biggest problem position).