He sqz preflop first, in BTN-UTG formation, thats noticible itself and his range from that point is very strong already. Then, you filter this range by your additional 4bet, althought its right that he might just call 100% of his 3betting range here given your sizing. Possibly might fold some offsuited broadways tho.

When spade hits turn, i dont see enough bluffs OTR tbh. Its usually just tons of Ax and TT in his range. To find enough buffs he would propably need to turn some pocketpairs into bluff.

So if i would like to argue for a call, i would argue that he might sometimes vbet worse QQ-JJ, but even that is very thin given how protected your range is by Ax/KK.

nh, even though i squeeze a bit higher