Honestly, why not both? A couple of paragraphs about the game, and a disclaimer-style sentence saying there's DRM, and that negatively affected enjoyment. Or reverse it, and have the DRM warning as the first thing someone sees.
So many reviews are just four lines - three about the DRM, and one simple "Game is good" about the game. I get that the game has DRM, but is it otherwise a good game? If so, why did you like it? If you bought it just to leave a review about the DRM, say that. The publishers are going to know anyways.
It's just so infuriating. I literally don't bother reading reviews for games I know have DRM, because there's just no value to them, for me.