I’m a user just like you. Just trying to help. I think you should open a ticket with ManyCam than vent on this board. As a user, I’m pretty happy with ManyCam myself. I looked into VMix but they are very expensive if you want any useful features. The only thing I miss about ManyCam really is the inability to use MIDI to control various functions and some functions are neither MIDI or shortcut controlled (like lower thirds).
I also had performance issues when using ManyCam with OBS. I was sending NDI from OBS on one PC to ManyCam on another. I now just grab the native NDI stream from the NDI WebCam Input directly.
I have yet to find anything as good as ManyCam for the price except perhaps OBS itself so for now, I’m mostly settling with ManyCam.
Steve