“Like it or not, he’s right about this.”
No! He’s not right. Trump’s problems are not self inflicted.
Trump’s problems are the nation’s problems, namely:
1) that we’ve strayed too far from the constitutional limitations on government intended by the Founders
2) that as a result, we have traded away our liberties for a nanny state, our manufacturing base for a Ponzi scheme, and our cultural values for an amoral system of political correctness.
3) that when faced with these seemingly insurmountable threats to our Republic, the entire Democrat party, many in the Republican party, the entire Hollywood celebrity crowd and the entire press core see fit to oppose any serious effort to find solutions, instead obsessing on fake news about non issues in a blatant effort to obstruct the man we the people elected POTUS.
How is any of that self-inflicted on Trump’s part?
These memes - that Trump’s problems are self inflicted, that Trump is acting like a 7 year old, or is not “presidential” enough, that he twitters too much, that it is immature for him to call the dishonest press “dishonest”, that his staff is in chaos, etc, etc, etc... are all memes generated by his enemies to distract from the real issue: they don’t want him to drain the swamp.
Any supposed Trump supporter that piles on with these memes, saying things like “I’m a Trump supporter, but Trump should really put a sock in it” is unwittingly assisting the left with their propaganda.
Of course, any criticism from the left, however unfair, has an element of truth to it... all the best lies have an element of truth - so Trump isn’t perfect, but why carry water for the left and repeat their anti Trump propaganda?
I’m not sure even Donald Trump would agree with all three of the points you’ve posted as “Trump’s problems” and “the nation’s problems.”