I think what's being said here is that you're probably good enough to beat higher stakes, but you're folding or even considering a fold way too often for 25NL. You have to make a hand and gambool against almost everyone at this level. If you know a certain player is solid that obviously changes, but don't get pushed off a strong non nut hand by just anyone.

Hand 1: Fold
Hand 2: Fold. The 7 helped you, and now he's raising. SLOWROLL
Hand 3: Please. Stack this bitch.
Hand 4: Value bet river