Struggling With My Dad Over Masjid Prayer Timings

Salaams everyone. So, we just opened a new masjid in our area, and my dad’s the main guy taking care of things like the money and, y’know, setting the Azaan and jamāʿat times. The problem is, he keeps making the Azaan times early, and when I try to correct him, he won’t listen at all. First off, he set Asr 7 minutes early. I told him, but he just shut me down and got upset. Later, the imam noticed and asked about it, so I mentioned I’d already tried talking to my dad and suggested the imam speak to him. After some back and forth, my dad fixed it, but then he started doing the same thing again-especially with Isha and Asr. This time, Isha was 5 minutes early. I waited, hoping someone else would say something, but no one seemed to mind. So I went to my dad myself and explained that it’s not right to call the Azaan before the prayer time actually starts, and if that happens, it should be done again. Instead of even considering what I said, he got angry right away, told me I was "doing too much," to be quiet, and even said stuff like "why don’t you leave and live somewhere else." We haven’t spoken since, and it’s been a few days now. The early Azaan is just one thing. There’s also some bidʿah going on. If he reacts like this over something clear-cut, I worry how we’ll ever talk about sticking to Tawheed and the Sunnah and avoiding shirk and bidʿah completely. I’d really appreciate any advice on this. JazakAllah.