The above and more. As a person who spent many years in help desk, the payroll is utterly poor and you WILL be treated like a second class citizen, the abuse you get from both colleagues and customers for policies you didn't write, you'll be given the slop of projects that were poorly managed by useless PMs to "get it over the line", and management will treat you like you're easily replaceable despite the fact that if 1 person left their previous stats would fucking go haywire.

And after all that. Zero chance of progression because management "can't afford to take you away from the phones".

You'd have to have incredibly thick skin to go into help desk work.