80% on Tier 3 or lower for Proton Click Play. That's not a small number. That means a majority of games, have bugs, crashing issues, things that cause them to be unplayable or glitchy...
So I repeat...
A lot of good those benchmarks do when only 20% of the games are playable to the same degree...
Great, you have success with it. But your anecdotal evidence does not make a solid claim to base things upon.