Yep it the ending was completely BS, and I’m not saying that because of pairings, although that is part of it. I say it because the ending felt like I wasted over a decade of my life following a manga that did not portray a meaningful message
The ending made me go back through things in the manga, and is what made me see that pretty much all of Part 2 (at the very least) was bull, hypocritical, and such.