I have found a leak

[glorfindel]

Your issue in small pots is probably a macho-ego, "I'm gonna outplay this guy" routine. Get over it. However, recognize that against a tight player this may be a profitable play at times. Against a loose player, just value bet if you have the hand for it; otherwise, let it go. Your profit against the loose player is from value betting, not bluffing.

Passive play in big pots is generally just bad poker. As you say yourself, apply SSH. Why you wouldn't when you know you should, I have no idea.