I feel the same.
Seojoon should’ve waited years before giving Jooan a chance.
Jooan was so selfish.
Imagine, Jooan slept with so many men who had striking resemblance to Hajin (his crush) for 15 years, and Seojoon stood there in complete defeat.
The fact that Jooan only realized his feelings for Seojoon after being rejected by Haiin is so bad.
What if Hajin accepted him? Then Seojoon never stood a chance.
Jooan is nothing but a selfish manwhore in my eyes
Exactly!! Them getting together was not satisfying at all to me for all those reasons you just said. I also got disappointed because I was thinking about how much better the story would be if Seojoon was the seme lol It's not fun seeing an uke suffering like that, that's a seme's job! And brats like Jooan should always be the ukes. When it comes to these things, I'm a tradjoshi through and through.

Maybe it's because I'm a very petty person but it's extremely hard for me to empathize with Jooan. If I was in Seojoon's shoes I'd never forgive him, even after all that chasing and explaining.
Like I get it, the whole "idealized first love" vs "the one who's been with you all along" parallel is supposed to be the whole point of their romance, but to me just thinking about the insecurities Jooan gave Seojoon during those FIFTEEN years is enough to not make their relationship worth it imo.
But that's on me. I'm always reading these stories hoping for the uke to turn over a new leaf and heal with someone new, knowing full well that's not gonna happen and getting disappointed lol.