Your motherboard wouldn't happen to be an AsRock? There's been reports of ASRock mobos in particular causing problems with 9000 series AMD chips, especially the X3D. Mate of mine running windows has been having it crash especially when idle at desktop.
I'm not familiar with a green Linux equivalent to the BSOD. Is it completely green? In that case it may be a graphics problem...
My understanding is that it's technically against their TOS but loosely enforced. They don't specify precise limits since they probably change over time and region. Once you get noticed, they'll block your traffic until you pay. Hence you can find people online that have been using it for years no problem, while other folks have been less lucky.
Basically their business strategy is to offer too-good-to-be-true free services that people start using and relying on, then charging once the bandwidth gets bigger.
It used to be worse, and all of cloudflare's services were technically limited to HTML files, but selectively enforced. They've since changed and clarified their policy a bit. As far as I've ever heard, they don't give a toss about the legality of your content, unless you're a neo Nazi.
I'm guessing the cloudflared daemon isn't connecting to jellyfin. You want to use http://. Also is jellyfin the hostname of the VM? Using localhost or 127.0.0.1 might be better ways to specify the same VM without relying on DNS for anything.
Personal opinion, but I wouldn't bother with fail2ban, it's a bit of effort to get it to work with cloudflare tunnel and easy to lock yourself out. Cloudflare's own zero trust feature would be more secure and only need fiddling around cloudflare's dashboard.
I had a 5 II too, used lineageOS for years, worked great. Doesn't totally solve the battery or fingerprint reader. My screen got the dreaded green lightsaber too. Nail in the coffin was Australia turning off 3G so it can't make calls anymore. (Wasn't officially sold here so they didn't bother loading it with VoLTE profiles)
Seems weird to have a separate app read sent and received messages? Is it poking holes in the Messages app sandbox?
Consider something like the aoostar R1 with Intel N100. Small and low power like a commercial consumer NAS but cheaper and you can chuck whatever OS you want.
Would you consider making the LLM/GPU monster server as a gaming desktop? Depends on how you plan to use it, you could have a beast gaming PC than can do LLM/stable diffusion stuff when not gaming. You can install loads of AI stuff on windows, arguably easier.
I've been using pcloud. They do one time upfront payments for 'lifetime' cloud storage. Catch a sale and it's ~$160/TB. For something long term like backups it seems unbeatable. To the point I sort of don't expect them to actually last forever, but if they last 2-3 years it's a decent deal still.
Use rclone to upload my files, honestly not ideal though since it's meant for file synchronisation not backups. Also they are dog slow. Downloading my 4TBs takes ~10 days.
My 10 year old ITX NAS build with 4 HDDs used 40W at idle. Just upgraded to an Aoostart WTR Pro with the same 4 HDDs, uses 28W at idle. My power bill currently averages around US$0.13/kWh.
I've always just wiped my work laptop and installed Linux.
Like Hawke said it seems like the graphics card or driver crashing. Very hard to troubleshoot, especially when it's random. Bazzite probably already has very recent drivers, there's this post on the bad website listing some things to try. This stuff can lead to superstitious thinking, with people changing something, rebooting to have it work fine for a while then they post that change as if it fixed it.
God speed.