What part of 'Swamp' do you not understand? Trump walked into that and became their best friend. More new debt in one term than any other President in US history. And that's the "adult" you support?
An adult wouldn't have run for and become President without having prepared himself properly to actually do the job. That would include identifying and properly vetting qualified and capable subordinates/advisors to staff his Administration.
Trump had more than a year and a half from the time he announced for office to the time he actually became president. If he was unable to learn the basic constitutional, legal, and regulatory structure of the government in that time, and was unable to identify and properly vet those advisors, then he was unqualified for the job in the first place and never should have run.
The repeated Trump excuse that he was an outsider, had to rely on the swamp, and therefore shouldn't be blamed for his crappy appointments, is a crock. 18+ months is plenty of time for him to have identified and assembled the right people, and learned the basics.
Either he's 1) dumb, 2) a poor judge of character, 3) intellectually lazy, or 4) some combination of the above.