[iforgot22]

Sounds a lot like a dedicated GPU is running and heat-throttling the whole thing, since you don't see CPU usage.

I wanted to say gaming laptops are a scam, but the older Intel MBPs with dedicated GPUs suffered too. More trouble than they're worth.

[varispeed]

One thing I notice is that Google Drive was using 15% of ARC GPU (laptop also has nVidia 4060). When I shut down that process, it cooled down a bit after a while, but system is still sluggish and fans work all the time, even if I switched it to "Silent" mode.

[iforgot22]

Does it have an option to shut off the dGPU entirely and rely on integrated? Just as a test.