Let’s start with Lost. When you create a series as intriguing as that, you really need a clear idea of where you are going. So regardless of how long Abrams was involved, the lack of an ending falls on his shoulders.
No. What the fuck, that literally makes no sense. TV shows are created all the time with no idea of what an ending might be. Abrams has nothing at all to do with whether you like the end of Lost or not. That’s just so fucking stupid.