Cover for him?

Why do I have to cover for him? He always passes the buck although it’s his own duty. What’s the worse ? I must accept additional work which he commands. And something that is beyond my ability. Low-paying , no responsible care, extra work, unreasonable (to add a noun here e.g. expectations/demands). Backseat (to add a noun here e.g. supervision/dictatorship),that is all he brings. When troubles comes, we should save his skin at the first time. When an error occurs,he uses us as a convenient scapegoats. This is my boss. Sadly, for some reasons, not that any of this will keep me from jumping ship.

Sorry to hear about your work situation. It must be challenging in your shoes. Be careful to always start the first word in a sentence with a capital letter. Your last sentence "...not that any of this will keep me from jumping ship" does not seem to match the rest of your passage. "Keep me from jumping ship" means to "give you reasons not to switch jobs", whereas your boss is behaving in a way that would give you many reasons to jump ship/leave. Therefore, it seems like the ending should have read "not that any of this would keep me from staying on in my job/under him."