Call it what you will, as you obviously intend to, but "generally", in your argument, is the key word that diminishes your own argument.
And the street-level action that you speak of amounts to nothing more than your basic, unlawful "riot" or "lynch mob".
The fact & definition of coup in the Ukraine remain clear, regardless of your lipstick-on-a-pig painting.
I think if you take the time to honestly look at what coup means you will see that my description of it is pretty good. An overthrow by street protesters is generally not considered a coup.
If you're just interested in framing this in a way that is convenient to you, you won't do that.