Is it normal that I hate my gf's kid?

I am so glad i came across this blog, i can relate to so many of these stories. My girlfriend has 2 sons, 7 and 4, and they both suck!! In the beginning i tried to play sports with the 7 year old because thats what i grew up doing, i spent 150 bucks one day on baseball equipment so i could have something to do with him because i really wanted my relationship with this girl to work. We play for 10 minutes and hes tired of it and dont want to play anymore. Instead he always has his face in a phone or a tablet. If neither of those hes up my girlfriends ass. The 4 year old is ok sometimes, like i can tell he likes me so thats cool. But i cant stand to be out in public with them because they act a fool every single time. Someone mentioned they grew up in a strict family, same thing with me.. when these kids backtalk and shit i feel like backhanding them both or taking their electronics away from them for extended periods of time because thats how it was when i was that age when i acted out. But my gd just says that times have changed. I thought about leaving, but shes pregnant, now im stuck with these 2 cock suckers for life