your KK hand is lol... 3bet preflop all the time with KK (to balance this you should 3bet with some worse hands too such as 99-QQ)

your JJ hand is also lol... not because you played too bad (even though your river and turn bets are super weak)... just that he was so horrible in not raising you on flop or turn...

be more agressive, you'll get more coolers, but you'll also get more value