>A coup requires that power is taken illegally (usually violently), and held
I (obviously) can't know what was in the minds of the folks who broke into the Capitol.
However, multiple news reports detail that a number of the folks arrested were carrying police-restraint style cable ties, firearms and explosives.
Given that both the Vice-president and the Speaker of the House (#2 and #3 in line of succession to the presidency), as well as both houses of Congress were in the Capitol at that moment, it's fair to ask who those folks intended to restrain with those cable ties?
And once they were restrained, what would they do with those restrained people?
Again, I can't say what was in the minds of the folks who attempted to occupy the US Capitol building, but some certainly brought weapons and tools indicating that they wanted to take hostages and possibly harm/kill them.
Do you usually bring molotov cocktails and police-style plastic restraints when you go sightseeing? Out to dinner, maybe? Or even to a protest rally?
While the protestors didn't storm the Capitol or bring tools to restrain people and destroy property, some segment of the rioters/insurrectionists did so.
As I mentioned, taking hostage and murdering the Vice President, the Speaker of the House and perhaps many members of Congress probably wouldn't have destroyed our government, but it certainly could be considered a coup attempt and definitely would be insurrection.