Thanks for sharing your experience. My issues with using my Surface Pro 7 with Zoom were manifest back in mid-Novembr. I'm not sure when or which Zoom updates may have made things worse for the SP7.
Although frustrated I spent so much money for the device and it doesn't do what I need it to do, much less better than my Surface Pro 4, the fact that I still have the old SP4 has still allowed my to use OneNote shared screen while running a Zoom class. Thus I haven't been nearly as frantic about finding as solution to why my Surface Pro 7 freezes up incessantly.
I truly wish either Microsoft and/or Zoom would come up with a solution to this issue. After all, the Surface product line seems to be the ultimate solution to remote instruction for the sciences, the screen freeze/OneNote issue notwithstanding. Since I've already spent the money on the SP7, I can't currently justify putting even more money into switching to Apple products, at least not at this point. I have been a loyal PC user for several decades and I would be profoundly disappointed to make a complete platform switch. Unfortunately, I may have to...