He got in and there is very little that can be done before 2020. There certainly were enablers, some of whom you can read about http://www.therealjohndavidson.com/2017/07/trump-enablers.html
Any president should be allowed some mismanagement and to some degree all of them are guilty. Too bad life threatening mistakes are legal, but at least some mismanagement can be amended with a new election.
Trump is admired by a significant portion of the population while others prefer to look elsewhere declaring that politics either bores them or is too many lies. Unfortunately his mismanagement (much of which is deliberate) affects everyone and not just Americans. Many people would add to my list, but in my mind he is guilty of GROSS mismanagement that needs to be punished. Here are a few.
Pulling out of the Paris Climate Agreement. This is a global problem with global obstacles in the form of vested interests and ignorance. United States despite a relatively small population contributes a major share of the problem. They fancy themselves as global leaders and in this case I believe they should be. While blaming China and others it is the U.S. that would make the most progress by setting an example. Most other nations would follow their lead. Obviously some of his supporters have a vested interest, but everyone, especially in the future will suffer.
Pulling out of the Iran agreement is inflammatory. Not perfect, but the imperfections are more than tolerated when found elsewhere. To build on what has already been agreed to not only by American negotiators, but also from Russia, Britain, China, France and Germany means other entities with their vested interests are being ignored. The purpose was to cut the proliferation of nuclear weapons that threaten us all. Trump is catering to Saudi Arabia and Israel. If Iran gets nuclear weapons Saudi Arabia will pressure to follow. For Israel, temporary relief, but more importantly lost an opportunity to improve relations.
Spreading hatred against minorities especially immigrants. Many Americans think their country should be white, but in truth diversity is strength and they need immigrants to keep growing.
Supposedly some people believe Trump is hurt that anyone would question his legitimacy and feels threatened by the suggestion that Russian helped him. Maybe so, but nonetheless Russians seem to influence decisions. They are the ones who want to break up international co-operation.
Vested interests are put in positions of power over finance, consumer protection and the environment.
The judicial system is being changed as something they are most proud of. Many voters assume this will make abortion illegal and further assume it is the best way to minimize abortion. At the same time they are tightening what Planned Parenthood can do. I maintain the best way to reduce abortion is to increase sex education, accessibility to contraception, parental leave, financial assistance for young parents, health care for all, all things resisted by conservatives.
Obviously Trump wanted to please the anti abortion group that tends to be a one issue voter. But the Supreme Court deals with many other issues and a conservative dominated court tends to favor big business and executive power. It is galling that Mitch McConnell was able to stymie an Obama nomination. Also that the Republicans rushed in Kavanagh despite some concerns that were not adequately addressed.
I would also like to add that the tax reduction bill he supported was irresponsible as the U.S. already had hard to manage debt and favoring the very wealthy would only increase inequality.