Crash every 30 minutes on a clean install sounds like a hardware issue. In my experience an Ubuntu install is able to run continuously for long stretches without issue.

Whether you enjoy switching to Mac OS is going to depend on what you use your machine for. In general, for my main work machine I use Mac and I have very little to no downtime ever. However, much of the benefit of going Mac is gained if you go all in on the ecosystem across devices.