Same, I tried it and was disappointed in the results. Nobody is better-positioned to wirelessly integrate the iPhone camera and a Mac better than Apple is, and it would encourage folks to stay in the Apple ecosystem.
Check out Camo (https://reincubate.com/camo/). I also had problems with EpocCam and switched earlier this year with an old iPhone 6 and have been really happy. $40/yr isn't super cheap but its easier and higher quality than me buying a webcam.