If Canonical wasn't so Microsoft-esque with strange decisions. The good old Amazon ads in the old versions, or the ad for Ubuntu pro in the terminal, old habits of cooking homegrown solutions instead of contribution to existing projects, or snap being centralised to their closed appstore and their push for this tech. They're not evil, but personally I don't like to trust them. Hell Canonical even had a Windows mobile called Ubuntu Touch, which now is a separate project. Linux Mint is just easier in this regard.

Ironically I started my linux journey with Manjaro, which has its own pile of crap and still survives in one of my systems after 4 years and 3 failed updates by power outage.