Hmm... I love my Ubisoft games. Rayman Legends is still the best platformer I've ever played. Far Cry 3, 4 and Blood Dragon are the only FPS to interest me. Beyomd Good and Evil was amazing. Watch Dogs had a better written campaign than GTA5 and Red Dead. uPlay is great for a free game every once and awhile and rewards players with dlc.
Edit: Also I don't think Ubisoft has ever "ruined" a franchise.
Heroes of Might and Magic.... Settlers and more than a few others
For ruined franchises? Not really fair, no other large publisher would touch that type of game or something like Might & Magic X with a barge pole, with a few exceptions (eg 2k and XCOM). But then other niche Ubi titles like the Anno series haven't been mentioned on their balance ledger either.
As for Paradox, people have short memories. Their history is of dreadfully optimised published games usually with dreadful bugs which are then dreadfully supported, plus more than occasional fallings out with their sub developers and some truly Bethesda level shenanigans. Their record recently has been better, but frankly it could scarcely have been worse, and they still have... problems. War of the Roses? Their dlc policy? Either would have got a roasting were it EA or Actiblizz doing it. PoE and Cities are successes, sure, much as Magicka was back in the day, but that alone doesn't make them 'nice' publishers. They tend to get a pass because their core games have a high fanboy density- not undeservedly, their internally developed games have nearly all been quality, albeit sometimes delayed quality- and they strive to maintain a reputation as an underdog. But...
Gettysburg: Armored Warfare? SOTS2 release fiasco? Stealing the title Achtung Panzer, which they've since never used? Trying to steal asterisking Mount & Blade as well (ironically, for War of the Roses)? Ship Simulator Extreme? Leviathan? Stalin vs Martians (so bad they've tried to expunge every mention of it)? Defenders of Ardania? A Game of Dwarfs? Impire? They've had more turkeys than Christmas and Thanksgiving combined.