I wish I could cut out toxic people as quickly as I can doubt my own intuitions

I've been there. You shouldn't blame yourself though. I realized not seeing the full blown toxicity in another, actually means we're good people that have a hard time seeing the bad. It's a good quality to have but can definitely lead to heartbreak and some anger toward ourselves. Move on and keep being you but just be more careful. By the way, I know it's a generic compliment but you are gorgeous!