Years ago, I tried cities skylines on a sort of shitty PC… spent at least 8 hours trying to get it to work, then just gave up.

Requested a refund and it was granted almost immediately.

I bought a better PC and repurchased, and not it runs fine but the game itself is pretty mod dependent and I have spent more time installing and uninstalling mods than actually playing the game.

So yes, ask for a refund and you will probably get it even outside the 2hour window.