I was a big fan of the original series. After watching the premier episode of tng, I dubbed it “Star Trek for women”.
it was pretty much that the first two seasons. If it was a first time concept it would never have lasted.
Part of it was Roddenberry’s own cash free society BS. The less involved he was the better the series. (voyager is an outlyer)
You also had mandates from suits to write about certain subjects. 100% of those episodes in any ST series were duds.
It was the Geen Koon(sp?) who made the original series.
As of right now TNG is no longer “canon” given the reboot. It does make enterprise canon.