Unless this is zoom or your'e playing more than 4 tables this is a great chance to learn about what that betsize means. Microstake players betsizing and betting patterns are like an exciting adventure every time

Id raise it to like 1.4 and see what happens. If he reraise or call and bet river big youve learned

If you always give him a 80% discount to buy the pot youll be pretty exploitable

People who bet all the time, but small, must be raised more often. Is this that kinda guy? Only one way to find out

Odd LIne. Cold Calls a 3 bet in worst position possible then starts out donking into 2 other players. So much less likely to be bluffing here than if it was HU. I think call on flop is obviously fine. Folding turn here seems reasonable even though the odds are ridiculous. I think you can call any combo of KQ that contains the Qs and probably fold the rest.

Raising here, at any point, seems bad. He has zero hands that can call a raise that you are beating besides some weird FD but that is a very small part of his range.