OperaGX is a privacy-invasive browser and I wouldn't recommend using it if you sincerely care about not getting your data exploited.
There are so many good browsers out there with better performance, privacy, cross-platform and features but you've chosen a Windows exclusive that's basically a Chromium Reskin. Recommend Brave or Firefox.
This is an Nvidia issue. I have problems on RTX mobile as well. Nvidia driver on Linux takes some time to be stable.
That's because Razer Synapse is a windows exclusive. There are alternative software for this, a quick search would throw many results.
Essentially, aside from hardware compatibility issues, it boils down to how much you're willing to change. You changed your operating system, can you not change apps like Browser and Razer synapse? Up to you.
No offense but that's quite possibly the worst opinion I've ever read on a FOSS OS. The power of Zorin lies in open source. If you want something closed source and privacy invasive, you can always use Windows, it's possibly the best OS for people who don't mind getting their data stolen or worse performance and security.
The point is, if you're trying alternatives, go all the way till the end. Try to find what works and what doesn't, and if it doesn't, Windows is always there as a last resort.