TOS is barely watchable for me with the exception of a small handful of episodes due to how utterly campy it was. It wasn't until TMP that I actually liked Star Trek. The TOS movies were all good, imo, exception being The Search for Spock. I even enjoyed Final Frontier. That said, I try not to judge but it's hard for me to see anyone blast the Abrams movies and yet hold TOS in such high regards. Personally, I think that might be a bit nostalgia getting in the way. I mean people say they prefer ridiculous looking rubber suit Gorn over Abrams Gorn which for the life of me, I can't understand. But hey, I'm not exactly on the line with a lot of Trekkies being one of my favorite movies was TMP and I did actually like FF.