I use my phone as little as I can bear. Barebones GrapheneOS, Fdroid for most things, browser for bank/maps, and four days of battery life. Every proprietary Android ROM is a downsell for me.
It can do emails and VPN just fine, so I'm wondering what the "average user" is missing. Grubhub? Crappy mobile games? Social networks that are making their lives worse? Definitely not YouTube because NewPipe is full-stop better. I'm just surprised that "Maybe I don't need all this toxic crap" is such a niche, extreme position that draws me funny looks and scorn.
Probably not the right place for a suggestion, but since you mentioned NewPipe, I would also suggest checking out LibreTube[0], been my choice of Youtube app after their redesign.