Not sure this is the answer, but going to throw my two cents. If you try and it works let us know.

When I got back into linux a couple years ago I hopped through all of the distros you mentioned. The last one being KDE Neon. When I first found it I absolutely loved it. Decided that was going to be my main distro and started migrating all my systems which is a couple laptops, gaming desktop, and mini PC.

Over time I found that I was having minor, but consistent hardware issues. Similar to yours, freezing, and other gpu issues. It was most apparent on systems that had newer hardware. Looking at the specs for your mini PC it seems a bit older than what I have so again, not sure this applies to you, but I found my saving grace in Fedora. My issue specifically was the older kernel Neon uses not interacting well with my newer hardware and in some cases not having access to some hardware features. Fedora had a KDE spin otherwise I wouldn’t have done it. It has been my daily driver on all systems since.

TL;DR: Try Feodra KDE Spin or any distro that ships with a more up to date kernel

Isn’t that common to not release how a vulnerability can be exploited publicly until you have it patched? Like yeah it won’t stop bad actors familiar with the space, but it would prevent normies like me jumping on the train.