KQ hand is fine. Folding is fine against a good reg, we have decent offsuit big cards out of position. 3betting is good against someone who loves to ISO limpers. Don't build strategy around what would or would not have worked against your opponent's actual hand. Can't fold river as played here.
JJ hand, I actually think calling is OK pre. Again, we are here to make money, not win pots. We can play our hand in position, and we are under-repped. If it comes two big cards on the flop, cool, we check-fold and on to the next. We aren't ENTITLED to win the pot just because we have jacks. Also, being concerned that people will call pre with Kx or Ax if we raise smaller is OK. We want our opponents to make a mistake, and calling 3bets with raggedy aces is a mistake, esp since we aren't paying them off when they flop an ace.
What hand is the reg making it 11x to open first in the pot? He went 7.5x over a limper with AQ. You also imply that he is shoving AK pre, and that you are folding if he shoves pre. If you make it $120, he jams for $450 effective (you don't say but I assume he covers?), and all others fold, we now have to call $330 to win $655, so almost exactly 2 to 1. We have over 36% equity against a range of QQ+, AK, so folding is now a mistake even if his range is that tight. We also are just turning our hand into a bluff if we are going to raise big enough that only hands that beat us stay in, and wasting the value of our hand.
I also think 3b to $80-90 is good/fine, as it lowers the SPR and has people calling without proper odds, but doesn't make everyone fold everything we beat, and doesn't lock us into calling off if the original raiser rips it. Also, him checking KK 3 times there is almost surely terrible, depending on what the board is. Are you really checking back AA or QQ twice there?
T5 hand bet bigger on the flop. River changes nothing, she doesn't have T8 there (tight lady isn't calling T8 on 557r ever never). I dunno what card is a spade on the flop, but she isn't calling the flush draw on turn then checking when it hits on river, she would bet. Bet river.