No, don´t remove the powerhint module. Kernel and module are meant to be run together.
There´s no reason the kernel would run hotter than the stock kernel or overheat if you´re not pushing the phone by gaming or other intensive tasks. In fact it runs cooler due to the PMU limiting.
That said the kernel won´t magically disable physics. If your ambient temp is 30°C the phone will run a lot warmer than on 20°C ambient temp.
Sounds to me like you´re either using a mods that´s conflicting or an app/service is stuck and is constantly requesting resources, which leads to your situation.
The other mod you´re using won´t solve whatever is causing your phone to overheat. It will just lower the threshold for thermal throttling to kick in.
What might help you:
Check cpu usage with top command. Go to terminal or connect via adb shell, grant su rights, type "top" without the "". Rotate the phone to landscape and check if an app is constantly on top.
I´ll attach an example of how it looks on my end.
If an app like facebook, instagram etc is constantly on top eating more than 10% in the CPU section you might have found the issue.
View attachment 5870833
If top command doesn´t help, check the logcat. If an app is spamming constantly multiple errors per second you might know what´s up.
Ultimately even simple things like adblocking can cause those issues. I once run into an issue, where an app tried to access a location that was being blocked by adaway. Instead of quitting after some time the app just tried over and over, which put a lot of load on the CPU and broke deepsleep.