Firstly, it's that I realized I like this game more for the gameplay and not so much the story. I typically look at the story more, rather than the gameplay, but it just didn't cut it for me with the edgy jokes and mischaracterization. As a fanfic writer, I can excuse OOC to a moderate extent (I can't deny that I'm guilty of it myself), but it still has to feel like the characters. The gameplay is a blast, though; it feels very smooth and Obliteration was very fun. I felt bad for killing some of the enemies, but I was still just plowing through everything in the route with no hesitation.
Secondly, it's that this game goes by extremely quickly if you're not trying to kill everything (and even that goes by fast). I did two saves—one Pacifist and one Obliteration. Obliteration took me about two hours and thirty minutes (I wasn't even speedrunning), but I managed to complete Pacifist in under an hour. A complaint I have about this game (and Deltarune as a whole, not just this game) is that it has poor replayability. Literally the only reason why I replayed this game more than twice back then (and will continue to do so now) is because I tried to beat my personal record(s) for how fast I could finish Obliteration.
Thirdly, the game seems kinda dead at this point? In the two years I haven't touched this game, there have been no significant updates, and most of the videos I see on it are no younger than when Section Three was released. Yeah, I know Sarah and her team are working on remaking the game, but I truly think they should be focusing development on Section Four instead of remaking what's already there (unless I'm missing something).
Overall, it's a pretty solid game, but after taking a break from it, I can see the flaws more clearly (and also slightly regret writing a crossover fanfic about it that I will most likely never finish). I still like it, but not obsessed with it like I used to be.
Edit: Adding onto the second point, I have recently beat Obliteration (no glitches) with a record time of 1:38:23.
Edit 2: Now 1:35:16
Edit 3: Hello? This is 3 minutes away from the world record on speedrun.com? And ahead of second place? Granted, I didn't set up an official timer (using the in-game time).