Lol! Yes! I’d never made the connection, but yes “AntiMS” was a name I chose originally to mean “anti-Microsoft.” And I used Github until the day I heard that Microsoft was buying Github. (Actually, my Github is still out there. I just force-pushed to overwrite all the history of all my Github repos with a single readme file that says “I moved to Gitlab.”)
I started using that username back before I realized all corporations were evil. I thought it was just Microsoft back then. Simpler times.