New Relationship / Should I dip asap?

A toxic girlfriend whom I was in the process of breaking a 10yr friendship off with introduced me to a dude her guy friend knew right when I quit hanging out with her.

Me and him started hanging out and after 3 days he asked me to be his girlfriend. I've never jumped in a relationship this fast, infact I've only been in two my entire life (3yrs, 7yrs)

I told the guy how she treats me and how bad it was making me feel.

She isn't completely all there by any means. Completely one sided, topic is always about her 100%, only wanted me over to clean her home and do the dishes, if I said I was sad she would hit me in the head and yell to get over it, would treat me like a doormat especially in front of other people to make herself look better.

Well instead of him seeing me this evening, he told me he was going over to her house to bum some weed.

I've completely 100% lost interest after hearing this. I don't know if I'm overreacting, but would you hangout/bum stuff off of somebody that treated your girlfriend like a doormat? She was my only girlfriend. I don't have friends.

Advice is greatly appreciated