I know that as an outsider, it's easy to analyze and pick apart everything wrong about this person or that person, or why they "shouldn't" be together, according to some people. I find it interesting how people can be "so disappointed" that this couple's still together, or that couple isn't. As a person that is soon to be married and has been with my partner for 7 years, I can totally say that the relationship can be fucking toxic at one point. Love just isn't enough if you want a long standing relationship. It's a constant choice. Take TW and HY for example, they were toxic af towards each other during parts of the show - and I totally could relate. Years ago, I had some qualities same to HY - I was gaslighting my partner and making it feel like everything is always his fault. Oftentimes people that we dub as "manipulative" don't even know they're doing it. I would walk out when we get into fights which is never a solution. In turn, my partner was also toxic. He, just like TW and HG during some parts of the show, would have unreasonable expectations and temper tantrums. A lot of these negative things I can look back and say, "at one point in time we were kinda like that." And just like all the couples in the show, we were at a brink of a breakup - multiple times. But we both made the constant choice to continue the relationship. Love isn't easy, once all the butterflies go away and you see each other for what the other is - human. Especially when finances inevitably get involved as you start living together. So if a couple decided to stay together, that's actually not so bad in my opinion, that just means they made that choice of choosing each other again, that they are willing to change and move forward. The last ep won't be the last time they will be making that decision, they will do that each day or each time their relationship gets tested. And if they change their decision in the future, that's fine. If they stick to it, that's fine as well - sometimes people really do genuinely change. It's not as simple as the other person just being "unable to realize that the other is bad", so dismissing their decisions to move forward together/not together isn't considering the whole picture - and that whole picture? Is only known to them.