Personally I feel Nemesis is the weakest of TNG films but they're all superior to the TOS films.
First Contact is, for me, not only the best Trek film but also in my top 3 favourite films. Generations is the second best, I don't the understand the hate apart from overzealous Kirk fanboys. Insurrection by default comes third, it's alright but more like an episode than a film.
In a way, maybe Nemesis failing was a blessing in disguise that Justice League of Trek thing featuring all the captains or something I read about sounded dire and would've probably killed the franchise permanently.