yeh i mean if i was him i would definitely contemplate flicking it in. you look youngish so would expect you to just riffle chips, stare at people and then squeeze to some amount with a bunch of low denomination chips with qq, ak+
i would expect to be flipping a bunch, dominating rarely, and dominated close to never.
it always depends on dynamics though, but just in general, from how i imagine id view you at the tables id probably assume ^ and potentially go with it. (if i didnt 3bet initially)
vs your perceived range he is getting a really great overlay/price though.
i know it really sucks, ive had some stinkers too, just be the bigger guy and get on with it knowing that he made a bad play vs your actual range.
also dont beat yourself up about not making money this week. you have had some really great runs and put yourself into good positions to make good money, that means youve played really well and you cant be pissed about how the poker gods decide who wins today, in reality you probably made a good 1-2000£ in slansky bucks and many more in galfond bucks.
btw where did it come? flop, turn or river? and were there any verbals?