The only way I can see Inquisition being the most decourated game in Bioware history is in sheer number of awards, which was only possible because the year it was released was quite weak. If you compare with Mass Effect 2 for example it went against Read Dead Redemption and Super Mario Galaxy 2 among others. And that game was way better receveid than Inquisition.
Inquisition never felt a success to me because people don't seem to care about it. I see a lot about The Witcher 3, Skyrim... Inquisiton? Almost never. After its release Bioware was pretty quiet about a sequel and we even had rumors that it was being shot down or something like that. Now they did tease a sequel but it was the worst teaser I've ever seen. They didn't even mentioned the name of the game. If we compare to the aftermath of ME3, which reportedly sold less, we knew a sequel was coming 1 year after the game was made.