Isn't this a massive excuse that runs directly against his core promise that he's a unique deal-maker who can get things accomplished no matter what? You seem to be saying that he was a charlatan who promised superhuman ability to "clean up the swamp" but couldn't deliver.
And sure, seven months is a pretty short time frame to achieve all his promises, but the first six months are actually the most productive period in most Presidents' terms, as they're coming in at a high in their popularity and with a lot of political capital from having won an election. Achieving one or two major promises isn't unreasonable.