Besides the obvious answer in the siblings, the more general answer (because there will always be something that won't transfer effortlessly) is that you don't have to play Starcraft 2. If the only way to engage in a leisure activity is by allowing yourself to be raped then maybe you should just not do it.
Starcraft 2 w/ Battlenet has been working on Linux for over a decade. You don’t even need Proton, it works lovely with WINE.
Besides the obvious answer in the siblings, the more general answer (because there will always be something that won't transfer effortlessly) is that you don't have to play Starcraft 2. If the only way to engage in a leisure activity is by allowing yourself to be raped then maybe you should just not do it.
Apparently it runs in Proton (I haven’t tried it though).