I don't know about crazy, but I certainly disagree with any claim that any Star Trek series (even my beloved DS9) is the best show of ALL time.
Of the TV series I've seen and can readily recall, I think I
might give that honor to
Six Feet Under, but it's such a subjective superlative in any case; I don't really feel like there's any way to call anything the best of anything, and I haven't watched enough TV to make any sort of objective analysis in any case. If you like it, awesome, but why imply that everything else is somehow inferior, or that anyone who disagrees with you is missing something you see?
But, FWIW, here's Variety's take on the question as of last year:
https://variety.com/lists/greatest-tv-shows-of-all-time/. TNG does place at #44 out of 100, and it's the only Trek installment on the list...but hey, they rate it higher than SFU, so there you go.