Presidents come and go in 8 years tops. Which is more systemically detrimental: an incompetent, lying, (insert pejorative here) President who last for 4 to 8 years, or a group of House and Senate members who also do all of the above, but last 30 to 40 years?
Take the politics out of it. Who has shaped where we are at in this country more? Trump and Obama or Pelosi and McConnell? I would argue the latter, they have longevity. Pelosi has been in the house since 1987. She has led the House Democrats since 2003. McConnell has been in the Senate since 1985 and part of the Republican Senate Leadership since 2003. That is 2 powerful people who have been in office through Reagan, Bush, Clinton, Bush, Obama, and Trump. I am 41 and that represents 6 of the 7 Presidents who have held office in my lifetime.
People like McConnell and Pelosi are the ones who really control the direction of the country. The whiplash nature of our current politics is due to them, and those like them, being completely unserious about their true job.
As to the media, when you turn the news into entertainment and a sporting event, you have 50% of the people you are supposed to be informing tuning you out because you play for the wrong team. And this is where everyone jumps in and says..."but, but, but, my news is better..." Great. You get a Giant Douche while the other people are eating a Turd Sandwich. You go ahead and feel superior with that. I don't.
I view Trump as a hammer to break some of the conventional thinking up. A hammer is not always the perfect tool, but sometimes it is the only tool that is available. He has challenged some long held conservative doctrine on economics that I have not always 100% bought into. The response to him is causing much needed realignment within our political system. There seems to be a "Never Trump" section of the right and a "Never Bernie" section of the left (what I would call the classic leadership of the Democratic and Republican Parties) that hold some similar views on economics that are forming. I don't see either of those two as all that interested in some of the social issues that drive politics. They play the game. Then there is the Progressive/Socialist (Bernie/AOC) left and the, for lack of a better term Trump right. When you compare some of their talking points, particularly on economics, you could find some strange bedfellows if we could break those groups into 3 select parties.
But to come full circle, our Presidents are a blip on the timeline whose Presidencies are often more defined by events outside of their control or by whomever they have to work with in Congress and the narrative by which the media treats them. So I conclude that often the most influential people in the direction or directionless trajectory of the country are often those that only 1 state or even 1 single district can vote for.