Klingon continuity is the only thing on here that can get me riled.
Faith of the Heart is... whatever. What Janeway did to Tuvix, I definitely wish didn't happen that way, but I can get over it.
But dammit stop fucking up Klingons, please. TOS gets a pass (and Enterprise, whatever its other problems, retconned a continuity fix for that.) But every Klingon fuckup after that is inexcusable. (Some more inexcusable than others.)
(Sorry. Sorry. I'll go take ten deep slow breaths now.)
DIS season 1 is the worst Klingon continuity issue, but the Chris Pine Star Trek movie Klingons weren't like other Klingons either. Enough so that the fanbase had to start speculating as to how to resolve that inconsistency.
The Kelvin line of movies is 100% non canon in my head. It's good they made a separate parallel universe, so I can pretend it never happened and just go on enjoying the rest of the trek