Many of my clients are mgtow. I've listened to various content creators online and find the content interesting and alot makes sense.
On a side note with social media being so interconnected into our lives I would be very very careful getting married in 2021 or years going forward. If one partner is unhappy for a moment they can get attention on fb and infidelity can start easily.
When the divorce happens courts tend to favor one party over the other by a large margin.
Let your stepdad know that its better she left and he has lots of time to pursue traveling etc and to enjoy life.