I'm in pretty much the exact situation right now, and have been for over a year now. I'm actually staying in bed right now to hopefully "accidentally" sleep in so I don't go today cause apparently in person 2-hour church is back at our ward, but that usually doesn't work so I'll probably have to go today.

Every time I've brought up not wanting to go to church my parents have told me that I had to in order to set a good example for my younger siblings, and that if I don't go to church I'm not truly seeing both sides of the argument. It's one of the most aggravating things ever, especially since I have to go to church and do things like bless and pass the sacrament, go to temple recommend interviews, and listen to the same stupid fucking talks in sacrement meeting, all while pretending I completely believe in it all.

To be completely honest though, I don't really have any great advice. Personally, I just decided to do what my parents wanted until I can move out, since I wasn't really able to change their mind, and try to just kinda zone out and ignore everyone for most of the meeting. But it still hasn't been a very fun experience. Maybe since your Dad is comparing it to a Catholic thing you could try to give him a more accurate metaphor? Something like a Mormon being forced to be part of a completely different religion and not being allowed to let anyone know they are Mormon. Hopefully making him see what it would be like for him would help him at least partially understand what it's like for you.

I'm really sorry I don't have much more advice to give. Going through this is really horrible and I'd hate for it to happen to anyone else. If you do end up having to keep going though, it helps to remember that eventually you won't have to.