You don’t really define what your dissatisfaction is with the Sony. Is this your first camera? (Not stated in your post) If you switched from another system, what was it and (in particular) how does the Sony compare (to what you had before, to your expectations).

I switched from Nikon slr to Sony A7 and was very disappointed. With the need to be forever in the (over complicated) Sony menu system. With image quality out of camera (and the effort post-processing to get to what I wanted). With forever needing to clean the sensor. Overall it just sapped my enthusiasm. Went to Canon slr and my satisfaction and enthusiasm returned.

So, I can understand your post. However, you haven’t broken down what your disappointment with the Sony is. So not really possible to say if a switch to another system (and which system) is the answer.