Everything was fine and suddenly my camera makes weird spin to the floor or to the ceiling it’s random and annoying af.
PLEASE FIX IT 
I’ve seen this before, though i cannot say it’s the same it could be an background process causing this.
Please move your issue to #technical-support for troubleshooting.
(Press the pencil to edit your thread and change the post destination in the dropdown menu to “Technical Support”)
Do you have high precision input on? Otherwise this can be an issue of overlays/background apps interfering with mouse input. But this is not a feature/design of Overwatch itself.
It is off but it happens randomly and i dont know what is causing that.
I’d recommend turning it on. I also recommend trying the steps here: