Not everyone is going to hop onto the internet to publicly report their issues.
But enough people are. People are talking about every small thing they did, what happened, whatever.
Also, with all the different plugins or stats available on this thing to track everything, you can probably create a pretty detailed breakdown of what someone did with their Steam Deck.
The last few Square releases weren’t Epic exclusive, if they even released there. However, Square also seemingly changes their mind about this stuff, like people change their underwear, so who knows in the end.