Let's be clear, getting rid of trump doesn't stop anything. If anything, they WANT someone to target trump, because that gives them justification to be more tyrannical. What you are advocating for is called a Civil War, and if we started one now, Trump would win.

Like all countries, we have a system of government in place. When it comes to removing the president (executive branch) over objectionable behaviour, we have a process: it falls on the judicial and legislative branches to conclude that the behaviour was objectionable and that the president should be forcibly removed (a process in the system called impeachment). Trying to remove the president using means outside this system is literally saying, "the system doesn't work, we need to throw it out, take matters into our own hands, and start from scratch", i.e. a civil war.

For now we continue to try to take steps within the system, but it is now abundantly clear to most Americans that the Republicans in Congress have been colluding to allow the president to do whatever objectionable thing he wants. SCOTUS seems to be doing something similar. Unfortunately, that is their prerogative in the system we have.

If a group of states said, "that's it, we're done, the system doesn't work, we don't acknowledge you as the president, and we're going to try to stop you" then within the system, it is the job of the US military to put a stop to that. Their job within the system is to ensure the system keeps working as the law dictates. And the US military is the most funded military in the world, so the rebellion would lose almost instantly.

This fall will be the real decider because of midterms. Trump is polling very poorly. A record number of Republican congress-people have announced they will not seek reelection. Democrats are winning in red states for the first time in close to a century. Trump is desperately trying to rig elections, and there's a possibility he'll attempt to cancel elections entirely. The result will be one of two things:

1. Democrats regain control of Congress, and all of the crimes that Republicans wouldn't hold anyone accountable for suddenly get held accountable.
2. Trump tries to say "the system isn't working, we need to establish a dictatorship and cancel elections".

Ideally it's option 1, but there's a very real chance it's option 2, in which case the US military is obligated to stop him. If they don't, then we will cross the bridge you're describing, and it won't be pretty.

How? Most people here are one missed paycheck away from having their lives upended; they have no time, money, or power. Look into the stats on poverty, healthcare, etc. in the US. The state of affairs is abysmal.

My point is that US citizens could remove their criminal president

If it were as simple as people just deciding to remove him then he would have been impeached in 2018 and again in 2020 and then sent to jail

Come do it yourself, you coward.