Fair point about /c/linux_gaming. OPs question wasn't really about gaming though and it was specifically about ubuntu/kubuntu.
So if anything, the OP should not have been in /c/linux_gaming, but the answers are on topic.
But even in regards to gaming, Mesa drivers are stable enough nowadays that even a bit outdated ones don't make a lot of tangible difference unless you are hunting for every last frame. In which case a beginner's distro isn't for you anyway.
The average casual gamer will have no issues with Ubuntu.