Responding in good faith, here. As far as I can tell, what people who voted for Trump have a problem with - and are thus quite happy with as far as action from this Administration is concerned - is that while there are ostensibly only three branches of the Federal Government (the Executive, the Legislative, and the Judicial), there is in fact a fourth. This fourth branch is the administrative state, and it is (in their telling, not stating this as fact necessarily) an unelected branch that has overwhelmingly leaned left since Richard Nixon, and has an enormous amount of control over the direction of government. One example is USAID, which is a broad way for federal dollars to be spent on various pet projects, prioritized by career bureaucrats with expansive (and expensive) resumes. Trump exerting control over how these dollars are spent is something they like, because they think it's weird (and I see their point) that the executive branch spends a ton of money that the elected officers in that branch may not want spent in that manner. (Yes, I am aware, some or most of this money is congressionally authorized in some manner, debatable, and honestly it's good to have that debate). Anyway, some people like seeing a chief executive asserting control over the executive branch. It's not really more complicated than that, and pearl clutching about "fascism" is pretty boring, because that is a word with specific meaning. Unless you want to expand that meaning, I suppose.
Agencies are created and funded by the legislature. The executive operates them, and has some discretion over their operations and priorities.
Rank and file workers have protections from firing by the executive because if they didn't, we would have the corrupt patronage systems we had 100 years ago.
Independent watchdogs at each agency are protected because political insulation is a requirement for such a role.
Put simply:
Authoritarianism is strongman politics where courts are ignored, and one/few people exert almost total control over the operation of government, ignoring any legal constraints on their power, and any criticism of the ruling party is inherently fake and illegitimate.
Fascism is the right wing brand of authoritarianism.
Reasonable people can debate spending levels or efficiency. But this administration is not interested in that. They are permanently destroying America's place in the world and at least temporarily, and illegally, destroying parts of the federal government. All while participating in eye watering levels of corruption and judicial self-service (firing prosecutors investigating friends, firing generals without cause, calling for impeachment of every judge they don't like).
Our government's design is broken. Our voting system only permits two parties. Our house districts are geographically manipulated. The electoral college further obfuscates the election or president.
I agree on the interpretation on the resentment of MAGA, but I do think the administration is fascist and the president should be removed and sentenced for treason. To MAGA, saving lives abroad by spending a small portion of our budget looks like a scam, like lipstick on imperialism. It's complimentary to describe military as a force for freedom rather than overpaid security guards for oligarchy, but MAGA are in on that joke. MAGA doesn't see any war as "stupid", nor do they sincerely mind private email servers or inflation and obviously don't actually value economic growth. Attributing rationality will leave you confused, the only consistent value among MAGA is accelerationism.
