Nah - you’re complaining that you “were forced into handing your password to someone else” when there were at least six ways you could have avoided that:
you gone to the computer,
they send the computer to you,
you remote in to the computer,
you tell them “suck it, you should have blocked iCloud sign-in with MDM” or, as others mentioned,
you sign out before handing the computer back or, my favourite,
don’t sign in to personal accounts on work devices even if they bug you to.
Finally, we release devices like this all the time through our ABM account. It takes 5 days maximum. Your IT team led you up the garden path.