I need help!!!

I’m sticking with my game plan, but all around junk is being played and I’m down into my starting bankroll that I put in after being up 40% of my original buy in. Some fool just played 9,3 suited in a middle position and won a good size pot, lucky in was not in the pot. It is becoming so frustrating to watch this junk keep winning, and I’m holding back all the time not to play my junk hands. I’m hoping I’m just having a bad weekend.

I may have a leak!

My luck has been to get good starting hands in an early position. I raise pre flop, and after the flop I bet when I have not even hit anything and nothing to dangerous has come on the flop. I bet to show that I have a strong hand and to try and push the junk out, but the junk hangs around all the way to the river, even when I keep betting. After the river I get check raised and I know I’m beaten. They normally hit two pair or a set.
Should I be betting after the flop, or just checking until I hit my cards?
I would really like some opinions on how to play good cards out of a early starting position.

Thank you, all