Their DRM stance, like U-play (on top of Steam), Tages, internet required to not only launch but continue to play many titles. It all still continues to this day, even after a few years back they made a big PR announcement about reducing/removing DRM from their gaming titles. Yeah, well I never saw any change whatsoever and their older library of games still are infested with Tages and more.
If I see Ubi as the publisher, I just skip it. Although it looks like I've either accidentally purchased one of their titles, or it was so cheap ($5) that I gave it a go.