Still not going well...

I can't decide if I am in the middle of a horrendous downswing or if I am just a really bad poker player. Two hands from yesterday leave me really confused. The first hand: I have KK in the hole. There is one raiser in front of me. I reraise him to let him know I have a strong hand. One guy behind me goes all in for less than I have. The origional raiser folds. The person behind me who goes all in flips over 10-3 of hearts. He turns a straight and rakes the pot. Is this a bad beat or a bad play on my part? The second hand: I have 6-8 of hearts and limp into the pot as do three others. The flop is 5-7-9. I flopped a straight. The turn is a K. leaving me heads up against one opponent. He goes all in and I call. He flips over K-7 for two pair. The river is a 7. GG me. I'm not sure what else I could've or should've done in either of these situations. It is very frustrating to continually get beaten at the river. I hope it turns around soon as I will not be putting any of my money into the game. I'm still playing on profit from Pokerroom but at this point, it won't last much longer.