[TheScientist]

A player like this will call the flop with anything, you can't assume he has a better hand than you.

You need to bet. It can be frustrating if you check his stats and his fold to turn bet pct is 10%, it almost seems pointless. But this is actually a value bet half the time. Plus you probably have outs with your Q and J, not to mention your flush draw. (I'd probably bet here without the flush draw)

If you're actually behind and villain has some hand like 56, you still have outs. If villain has a 2, even a loose passive raises here, and you can count your outs to the flush to see if its worth calling. If villain is holding a weak ace he will call to the river, you'll just have to suck it up in that case.

The river is a tougher decision. Most of the time if another blank hits you can check and villain will check behind (mostly with junk, but sometimes even with a small pair). Obviously you can't bet since you'll only be called by a better hand. Judging by the villains description, I'd go for a check/fold. This type of player is unlikely to bet with nothing on the river.