I never watched Game of Thrones when it was originally on, but it's always been something multiple people have recommended to me so I finally went ahead and watched it a few weeks ago. I was warned that I'd be really disappointed by the ending, and of course, I was extremely frustrated!
I started trying to watch House of the Dragon immediately after, I got about 3-4 episodes in but I just couldn't get along with it. I'll probably try to revisit watching it at some point, but after the disappointing ending to GoT, maybe I just wasn't quite ready yet.