Cut off toxic friend

I had a friend who was really toxic. They were in the friend group. I cut them off a while ago now but my other friends dont understand why i did as they couldn't see it. They think it's pathetic and have been telling me that they are still friends with them and will still meet up with them.

I said this is fine i won't force them to not be friends with people but personally i just won't be around someone who didn't treat me like a friend. I always say this whenever they bring something up.

Any other advice would be helpful or anyone who has been in a situation like this