i overreacted big time

so i was hanging out with my grandkids and we were just watching some old tv show reruns, you know the ones that have been around forever. then my grandson starts going on about how bad it is to be watching these dumb shows, like its totally outdated and stupid stuff for kids now. honestly, im not even mad at him really, he's a kid and kids do this kind of thing but it got under my skin more than i thought it would. we started arguing over if its okay or not to watch these kinds of things since they arent exactly the greatest quality shows in terms of story lines or visuals. and before i knew it, i was yelling at him that he knows nothing about good tv shows because hes only seen like 20 seasons of some stupid modern cartoon. after i said all that, i just sat there staring at my lap feeling pretty dumb because honestly, what was the point in fighting over this. but i couldnt take it back and now im left wondering why i even got so worked up about a tv show being outdated or not when i know he probably wont be watching these shows much longer anyway. i feel bad now but there is a part of me that just feels like im losing the battle with time, you know? my kids are grown and their kids are growing up fast. maybe i overreacted bigtime just because im trying to hold on to something from when they were younger.