I feel like Astarion kinda has his reasons to be on his slightly chaotic evil path

After all
[/spoiler]he is a 200 year old vampire who probably went through a lot of torture from cazador during that time[spoiler]

I mean if anyone went through that I think becoming that cynical and "evil" is an understandable choice.

It's easy to see his flaws but again it's still act 1 and EA he could end up becoming an entirely different person during the adventure and surprise us, (or stay an asshole which will be funny but also kinda sad)