Steam is nothing more than DRM with a chat attached, giving it so much praise is redunkulous. Paradox must've not been happy with how easy it was to pirate their games, even though patch support was enough of a selling point for most people I know to actually buy the game.
Paradox did not enable DRM. Steam is much much more than DRM, it's a way of keeping your games in one place and a way to discover new games. Paradox has literally done next to nothing to protect their games from piracy, other than making that seven deadly sins video for Ck2.