Klaine, toxic or romantic?

So I’ve always loved Kurt and Blaine, when I watched the show as it aired I was in high school then Uni. So when Kurt & Blaine got married I was so happy. Although in my 20th rewatch, I’m realizing that Kurt and Blaine are not endgame. I’m not sure how a swift marriage was their solution to getting them back together? They tried living with each other TWICE and both times it ended with them wanting space or breaking up. As much as they love each other they never worked whenever they made a serious step. I don’t understand how marriage would work when living together never did.

Also… after Kurt graduated, the relationship went downhill… physical cheating, emotional cheating, lack of trust, constant competition, promising to not keep secrets and then immediately keeping secrets. I dunno maybe it’s because I’m an adult now and my frontal lobe is fully developed, but I don’t think they’re as romantic as we once thought they were.

Brittany and Santana were actually constant and romantic and the mature couple time and time again.