Based on what are you concluding this? Over a minor sample?

I got beaten today with KK AI PF vs. KQo where the guy hit a Q on the flop and then one on the river. Also got beaten by an AKo getting it in PF with KK where board got TJJ Q T. And should I stop pushing it in with KK beacuse of these situations? No obviously, because next time I face these types of situations I'll profit more than I'll lose.

You'd want to get it in with KK preflop almost every time you get them.