Romney deserves to have had to go down on his knees to Trump with no positive results.  

He threw Trump under the bus in March in the harshest terms possible for a politician  and then 'expects' one of the four most powerful jobs in the US Government from the fellow he threw under the bus?

Not going to happen; certainly not for someone like Trump.  He holds a grudge---sort of like Putin held against Hillary when she trashed his last election.