When the event took place, I was thousands of miles away. I wasn't there, so I don't really know what happened - other than what was being reported in the news, multiple sources. There was unlawful entry, property destruction, violence, many injuries, and a few deaths. All of the sources seem to agree on that part of it.
Some say they could have - and should have - had a larger force to guard the Capitol, since it should have been easy to anticipate the gathering and how ugly it could have been. So, there was definitely a screw-up there.
The main point of contention has been - at least as far as I can observe - was not over "what happened," but what it should be called - an insurrection or just a riot?