You aren’t alone having stability problems with Ubuntu. As much as I like the OS, my Ubuntu installs always broke and required troubleshooting at some point. Right now I only have Ubuntu installed on a bootable USB ssd that I use for backups and other disk operations, but even on that the desktop crashes regularly.
I eventually got tired exploring different distos and switched back to Mint. It’s been running with regular updates and upgrades on my desktop PC for 5 years and 3 on my laptop. I’ve had very few problems. Debian has been just as stable on my server.
You got a year? Ubuntu must be improving! I’d typically get 2-4 months and then have to spend hours troubleshooting to get something working again. I can’t remember the last time that happened to one of my Mint installations.