Raising for information is generally bad because you already have a decent amount of info. From your posts, I can see that you are actively assigning ranges, and this is very good - you're light years ahead of the average 2NLer and I hope you move up fast.

Assigning a range for villain donking into you on the flop and then proceed with the hand based on that range. Don't bloat the pot further by putting in 1/3 of your stack and then deciding you're beat, and truthfully, I'm not convinced that you were. People at 2NL make crazy min flop 3bets with some kind of middle pair ALL DAY LONG, and min raises like the one you made induce that kind of stuff too.

If you knew this villain well enough that you could profitably take this raise fold line against him because "he only 3bets the flop with trips or better in this spot" then you should already have that information on him that you were paying to get like "his range for 1/2 pot donking the flop has me crushed".