I’m not going to tell you what to do. I am going to point out the red flags you cited and ask what you would say to a friend who was considering dating someone who behaves like this.

he kept talking about… that i should’ve ditched my bf for him

In other words, he did not respect your relationship when you were in one.

badmouthed not only his gf of a few years

He handles struggles in a relationship by badmouthing his partner to others,

he left her bc she showed signs of schizophrenia

and uses an armchair diagnosis as an excuse to get out of a relationship instead of just saying it’s not working for him anymore like an adult.

he kept guilttripping me when i said i didn’t want to be his gf

He doesn’t care about your preferences, and tries to manipulate you when they don’t match his.

Any time I’m required to use an app for something that could be a website, I leave the app a one star review.

Contributing to that Kinderficker changes my opinion of Publix.

It doesn’t exist, and some people get really mad whenever someone tries to make one.

https://cathode.church/fedi-scraper-counter.html