I was wondering the same thing, especially because TOS is my favorite!! It’s only 3 seasons long, and for me each episode is an absolute gem.
Totally agree on Star Trek II being the best movie. TOS S1E22 explores the backstory of the film’s villain.
I loved the camaraderie of the characters. It reminded me of playing DnD when I was in middle school. It made me wish I knew people who played now, I would love to get into it again. Fun times.