I believe the biggest issue is more to do with matchmaking trying to provide engagement rather than good assessment of players’ skills. This is obvious when you see systems where winning gives you a good amount of points/tank regardless of the opponents skill level, which just foments even more the want for easy stomps rather than good games.
If you mean the switch, then it has been thoroughly squashed. If you mean phones, well I think we can agree they are not really competing for the same customers, and if you think they do, most people are buying phones for reasons other than gaming. So you’d need a way to section the market for “gaming phones” (yes, that’s a thing).
Everyone that doesn’t have a switch?