What are you trying to achieve by checking the flop? I don't think it's terrible but would like to know your thought process.

If you are going to be deceptive here then you need to call river imo, your range looks weak after flop + turn and he probably doesn't think KK/AA can ever be in your range here, tbh I'd expect to see AQ/TT most of the time because he was trying to look polarized on the river so you'd make a hero call.

That might not make any sense.