Honestly, the best bet is probably to cut him out of your life. If he values your friendship he’ll try to make amends. If not, your life will likely improve without a toxic influence.

If you don’t want to do this, because you value his friendship or want to teach him, that makes you a wonderful person and I wish you the best of luck. There’s a lot of resources out there on healthy menslib places (such as reddit /r/menslib)