I use the term "friendship" very loosely here.
A friend I used to have:
Constantly gaslighted me (very overused term but was told it happened to me by a psychologist)
Would criticise and put me down at every opportunity.
Put my life at risk by deliberately speeding and swerving across the road laughing while she did it. She ended up losing control of the car and luckily we only ended up in a small ditch with no damage. I was shaking and angry at her and she laughed at me and told me to get over it and called me a loser.
Would tell me I'm fat and that she was telling me for my own good because I needed to know (like I'm not aware of what I look like!) when I told her the comments were inappropriate she told me that I'm always so sensitive and if I didn't stop being so sensitive I'd be a loser my whole life. I pointed out to her that she wasn't so perfect either and she got angry with me and told me that I'm always so insensitive and I needed to learn how to treat people with more sensitivity - despite telling me 5 minutes earlier that I'm always too sensitive.
She had issues with everyone in her life. Every job she had there would be an issue with someone, according to her they were all useless and she always had to show them what to do including her bosses because she new more than they did.
When she would message me if I didn't reply pretty much straight away she would send constant abusive texts one after the other.
If I made plans with other people she would tell me they weren't my real friends and that only she was and I shouldn't have too much fun with them because it wouldn't last. Other times she would get angry with me because I had gone out with other people and not her and this meant I was a very bad friend who only thought about myself.
Every conversation was about herself and if I tried to change the topic and tell her about something that had happened to me she'd cut me off after a couple of minutes and say 'yeah that's great, anyway back to me'.
She would get angry if I disagreed with her about anything no matter what the topic. She once got angry with me and screamed at me for half an hour telling me I was wrong and stupid and I didn't know what I was talking about. My crime? I didn't like a movie that she did. Yes seriously. Unfortunately I couldn't walk away as we were in her car driving.
When I was going through really really bad depression and other things (which turned out to be psychosis and mania) she told me I was a loser and to get over it. When I told her I needed space she constantly called and messaged me over and over again saying just get over it and come out. The more I ignored her the more abusive she got.
I kept ignoring her hoping she'd give up and go away. The messages continued for several weeks/months (memory is hazy) but I never responded to them. Final message from her was telling me that I was nothing but a pathetic loser and that I was the most selfish self-centred person she had ever met and that she was ending the friendship because she couldn't have someone who was mentally ill like me in her life.
This is only a very short list of all the things she did. But I'm so happy to have her out of my life and never again will I let her or anyone with similar behaviour into my life again.