I left my old company for the same reasons. I didn't know who my boss was or who I should report to for months.
Everyone was clueless. You asked for help or directions by pinging some guy you didn't know on Slack and the best you'd get was "yeeeeeah I worked on this project long ago, I forgot, sorry, nice to meet you though wanna go grab a coffee sometime?"
Clients left hanging because somewhere in the sales process someone forgot about them in the pipeline. When some work actually got through nobody did anything for weeks until someone would promote himself to project manager out of good will (which you could do by putting your name in the project charter bullshit and on the Trello board of course) and assigned some teams (uiux, dev, qa ecc) to it. When you needed e.g. design files for something your best guess was to look in the Gdrive folder, find who has shared access, and ask them who worked on the design if by any chance they know something about it.
The result of this was the worst time to market I've seen. Like 2-3 year delays were the norm. I have no idea how companies like this manage to survive. They weren't doing that bad economically either (they won lots of government funding mostly)
Before I finally landed at a decent company, I used to have this concept of the "Dilbert coefficient." Basically, if there were too many Dilbert cartoons on display, it was a red flag, and if there were none, it was a potential red flag, because I thought it implied people might be afraid to put them up.
I'm happy to say office I'll be going back to when it's safe to do so has zero Dilbert cartoons, but several memes and semi-permanent pieces of whiteboard art.
In practice the first day or two doesn't matter that much, you're getting your laptop - meeting some people, signing into some accounts.
I don't think this is really that big of a deal in the scheme of things.
So yeah you would have been good. Probably worth keeping the lesson in mind though of if you're stuck between doing something the standard company way or listening to some grey beard saying "hey kid, do this instead", probably stick to the company way. It has built in training wheels the grey beard either just doesn't need or considers a hinderance.
As someone trying to figure out how to turn my diploma into a job despite intense impostor syndrome, this tale is absolutely harrowing.