Why Is My MacBook Pro M5 So Slow and Overheating?

if you are not running any of the things I mentioned, the best way forward is to use etrecheck and post its pre-sanitized reply here on the forums for readers to look at. Many eyes looking have found many subtle problems and allowed them to be solved directly in a short amount of time.

Consider downloading and running this little "discovery" utility, Etrecheck. It changes NOTHING. Etrecheck was developed by a senior contributor here, and uses mostly system calls and simple tests to collect often-needed information.

it contains little tests for speeds of devices, CPU utilization, memory usage, energy usage and a digest of recent problems, in one easy to use package. it does not even need to be Installed. Because less can be learned when your Mac is running great, best time to run is when your problems are actually occurring, if possible.

if you follow the directions faithfully, its report (pre-laundered of all personally-identifiable information) can be "Shared" to the System ClipBoard, then Pasted into an ‘Additional Text’ window in a reply on the forums.

Use Etrecheck Pro for free:

http://Etrecheck.com

The amount of data you get can be daunting. If you POST your report, some Readers here are willing to look over those reports, and can provide valuable insights.

then start reply on the forums, click the 'additional text' icon, and PASTE

By far the easiest way to cause poor performance, instability, overheating and crashing is to install ANY third-party speeder-uppers, Cleaners, Optimizers, Third-party Virus scanners, Bit Torrent, or a VPN that you installed yourself.

¿Are you running any of those?

I have the exact same hardware and I am experiencing the exact same issue. I used to have a MacBook Pro M2 8GB of RAM, and I honestly never saw it heat up. I am submitting my new M5 to a considerably lower load, and it heats-up like no other laptop I have ever had.