I have a Macbook 12" from 2015 with High Sierra. Works fine with the latest version. it took Apple a year to release a stable macOS for the Macbook. Now I have

I have a Macbook 12" from 2015 with High Sierra. Works fine with the latest version. it took Apple a year to release a stable macOS for the Macbook. Now I have very little problems, but before it was common not to wake up reliably, running external screen had problems, etc. My Quadcore i7 Mac mini is still a mess under High Sierra. I see it freezing very often and especially when the machine gets some load. It's basically not usable for anything beyond reading mail and browsing the web. It was freezing once a month under Sierra. Under High Sierra it can freeze several times a day. Last days it was also rebooting on itself, twice. I had filed a bug report, but Apple asked for a full system diagnosis report, which is not something I can give away because it would contain restricted information.