Of course a lot of Trump's problems are self inflicted. This is obvious. He can't break his Twitter addiction, and he speaks in gauche and brutal terms. This is unprofessional and the media jumps on every faux-pas they can find.
Congress and the MSM were just as much against Reagan as they are currently against Trump. The difference is Reagan had the dignity and finesse to deflect it gracefully. Trump, on the other hand, tries to 'fight it' rather than deflect it. And his response only feeds the egos of those taunting him. This just makes every little nothing taunt that much bigger. And his detractors know this full well.
HEY TRUMP! THE ONLY PEOPLE WHO SHOULD BE 'TWEETING' ARE YOUR PR PEOPLE. YOU CAN TELL THEM WHAT YOU WANT TO SAY AND THAT'S FINE. BUT LET THEM WRITE IT. STAY OFF TWITTER! YOU DUMBASS!