Yeah, the only time proton can actually outperform windows is when it spots a fundamental performance error that the app has made, and is able to optimize it out, AND no windows driver does the same. This is comparing Linux+proton at its best vs windows+native at its worst.
What we really want to see is Linux+native at its best vs windows+native at its best. Unfortunately, there aren’t a lot of demanding games that natively support Linux.