actually,oro wuped jiraiya in that match,jiraiya didnt do anything,manda was abt to eat him and bunta if tsunade didnt show up and save their hides.
Kakashi can defeat all kages?,either you are a hopeless fanboy or a trollxd. They were abt to make him hokage simply because the current one was in a coma and it was between him and guy,it's not like the sannin was there,or any elite ninja besides guyxd,hiruzen wanted oro to be the hokage above others like tsunade,jiraiya and minato,but oro was evil,so that point is quite invalid.
Kakashi has become stronger but still not enough to beat oroU_U,deal with it.