bet less on the flop if you bet at all. I don't hate a bet for 3-4 to be honest.

Turn bet is really bad unelss you're just intending to 3 barrel every single river (which is also probably bad, but less bad then betting turn to check river).

His turn check raise is kind of suspicious when there's probably not many 5x hand he plays for a call from the sb and you hold a 7 blocking middle set, so I guess i could see the reasoning behind calling it. Once he gives up on the ace i think its kind of likely that he either rivered you with an ace-bluff and is not folding, or your hand is good any way so definitely check.