Also bear in mind that you will not have any access to Windows Update if you run Windows 7 on a Ryzen system. You also have less than a year left before Windows 7 reaches end of life, meaning no more updates of any kind.
You can try.
Likely, your motherboard does not support windows 7, meaning that you may not be able to use usb3.0 and may not be able to install any other motherboard drivers.
Nvidia still supports windows 7 drivers so that would be ok.
It would not bother me one bit to not get any updates at all.
I am with you on not liking windows 10.
It is most intrusive.
There are about 10 settings that need to be turned off.
I do ok using windows classic shell that will give you the appearance of windows 7.
It might be worth going the PRO route on windows 10. That lets you defer on upgrades for a year.