Are there any bad lenses for emount?

In my search for the best lenses, I have seen a huge difference between them. But none of them are actually bad. They are either clinically sharp, have character, render differently, handle uniquely, weigh too much, cost a lot, etc...
I have the 50GM which is the standard barer of quality to me in the Sony Emount system.  If you can afford it and can  handle the weight and focal length, I don't think you can find a better lens.  That said, I have a TTartisans 50/2 that is incredibly good for what it is, especially at a price of $69.
Got me to thinking about the myriad of lenses I have, and how I favor some but not the others, but when used in the right situation, the results can be perfect.   I shot with my 7artisans 35/1.4, vignetting but with a sharp center and beautiful rendering.  I captured some lovely shots of the family yesterday with this flawed lens.
Sony 20/2.8 really only good at autofocusing and being small, but it too can capture great snapshots, and is a really good video lens for vlogging.

But none of these lenses are "bad" when used in the proper scenario.  I am still growing into this hobby, but I think I hit a milestone of being able to grab a lens almost any lens, and knowing how to use it in my chosen scenario.  
That said do you know of any truly poor lenses for Sony?