Debian 12 (bookworm):

• Works without having to troubleshoot all the time - Check
• Reliable - Check
• Customize and install pretty much everything available - Half Check - Since the kernel is from 2022, you won’t have the latest versions of some software (eg. KDE), and some features will not be available (eg. changing CPU operation mode)- Unless you develop applications for Linux, or need a specific feature, it shouldn’t be a problem.

My previous reply was erroneus. There are reports of those processors working properly, so they probably are fully supported on linux. I suggest you keep at it.

The first response of this thread has some other things to try: https://askubuntu.com/questions/1329587/intel-core-i7-8550u-cpu-frequency-drops-on-high-loads-on-ubuntu-20-04

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