I do agree with you on thermal management on Windows 'ultra'books. I've had two now with crazy bad thermal throttling. Often fans going when very little CPU load, and then when I do use the CPU/GPU hard, it pegs it back so much that it is unusable. I've seen it pegging a Ryzen CPU down to 0.5GHz which makes the whole system unusable. The laptop doesn't feel ridiculously hot to touch, so no idea what is going on.