First hand your 5bet is huge relative to stacks, you can raise smaller, enticing calls from a wider range, and still shove flop easily, getting calls from lots of worse hands. I'd make it around $5.50.

Second hand I thought was spew but looking at his stack size it's standard. I doubt he folds 77+ after the previous AA hand.

4bet/fold pre flop should indicate this guy either has big pf bluffs in him or he can find a fold with AQ/AK/QQ, which should suggest either way that this player is not an idiot. Bad players don't tend to 4bet bluff because 3bets are so scary to them, and bad players don't ever fold AK/QQ pre flop. So don't assume this guy is bad when he 4bet/folds pre, on the contrary consider him dangerous.