advowson: You can ask support for a refund. Since your complaint does not fall into one of the categories where a refund is nearly guaranteed (mostly, that you tried to play on a supported platform; that the game was severely broken; and that GOG Support couldn't get it to work), they may refuse your request. Being dissatisfied with the purchase is not a category for which a refund is promised. There's no harm in asking though, especially if you can present a convincing case that the store page is substantially misleading about what you get.
Well I mean it's right here in the store description.
For those wanting something a bit more modern, Blizzard and GOG.COM have collaborated on an updated version of the game tuned for today’s gaming PCs, which includes out-of-the-box Windows 10 compatibility, a host of bug fixes and
high-resolution support.