You can be a Trek fan without loving TOS. But if we think tolerance and empathy are good things, it makes sense to practice tolerating and empathizing with our own past.
I was born in 1968 and grew up with reruns of TOS. I can only remember seeing a handful of episodes for the first time (and those are some of my earliest memories). Some of the episodes are awful, and the third season is overall very weak. You can be a Trek fan without loving…