I’m not using Windows so I can’t help specifically, but I do know from others that the performance issues on Windows is often related to hardware disk I/O — it’s more about node than is is about Redwood.
Some suggestions:
- have you read this? Windows Subsystem for Linux Setup
- can you copy/paste the output of
yarn rw info? - Node.js v16 is terribly slow on Windows. Make sure you’re at > v18
Lastly, understood this is a huge bummer. You boost your hardware expecting things to be a lot more snappy (and fun) only to have spent money and find out it’s the opposite case. 
There are some other dev options we can try next. But do start with the questions above.