Bethesda laid the foundation, which is responsible for many, if not most, of the bugs. The engine just svcks. Obsidian has nothing to do with that.
So what about alpha protocal ? KoToR2 ?
Personally bethesda takes some faults as they laid the the foundation, but that dosent mean obsidian is immune from criticism and its all beths fault.
I havent had too many bugs, and would like to thank Obsicdian and Bethesda for making an amazing game.