There’s some truth to this statement but not for the reason you’re insinuating.
If, after January 2021, Trump had simply gone back to his private life of grifting off the masses through his various commercial ventures, I doubt much of any of this would have been pursued. The documents case being the one exception, assuming the classified documents in question were truly sensitive matters of national security.
It is precisely because Trump remains deeply immersed in our national politics and remains a threat to our democracy, that you’re seeing every opportunity to derail him being used to prevent his return to the Oval Office. Almost no one wants him there but the cucks in the Republican Party don’t have the balls to stand up to him.