I just created an account to boost this thread.

After all we've been through together, Tav devoting her heart and soul to help Astarion become a better person to just watch him burn and run away in pain. I was devastated and other companions mocking him just made me nearly fall out of my chair. What the hell...
Let me run after him and comfort him goddamit!
It hurts even more after learning that
when you play him as origin, he ran to hide under nearby crates and he sat there curled up, alone and sad.

the conversation before credits when you romancing him doesn't make things any better. It was more like I was talking to a friend, not a partner.