Season 3 of Kaguya-sama is a bit of an enigma, once episodes 12 and 13 have aired, it will have the 2 best episodes of the series in it, but it will also have a lot of the weakest episodes as well. One of the reasons for this is it has spent more than half of the episodes this season building up to the finale, and as great as the payoff will be, there will be a majority of the season that doesn't quite live up to seasons 1 and 2.
Having said all that, Kaguya-sama is still 1 of my favorite anime of all-time. Even if I feel season 3 is the weakest of the show, it still has amazing art/animation, voice acting and humor. It is still the king of romantic comedies and I just hope that the rest of the manga gets adapted. There is still enough chapters for 3 more seasons and I think the best material has yet to be adapted. 9/10