I would argue that Mac hardware has never been the bottleneck for games. The bottleneck has been Apple drivers. When they decided to deprecate OpenGL, the video drivers for even powerful GPUs stagnated, hampering game performance. That is why simply using BootCamp with Windows allowed games to work so much better on the Apple hardware. This is by no means indicative that Windows is a better OS for gaming, but just indicative of Apple holding back games through inaction. Games that received metal ports tend to perform much better on Apple Hardware (because that is where Apple is focusing their efforts), and in fact because Rosetta2 seems to translate OpenGL calls to Metal, some OpenGL games run smoother on M1 based hardware than on Intel based systems. Many folks use this to point out how much better M1 systems are than the systems they replaced, which is invalid. You can't directly compare a game running OpenGL on an older Intel Mac against the same game on M1. You *might* get a more valid comparison if you compared BootCamp scores against M1 metal scores though....
I am NOT saying that Intel based Macs are superior to M1, this is simply false. The new Apple Silicon systems are superior to the Intel systems they replaced, in almost every way. There are a few things that Intel-based Macs just do better (and you know what that is, if you need it), but for most of us, there is no question.
PS. You don't buy a Mac system to play computer games, period. However, that doesn't mean that you can't or shouldn't play games on one
Game On!