I was getting paid £200k/yr as a Software Engineer for a company with an unresponsive offshore IT help desk. I would often spend a few hours (!!) a day helping various stakeholders with their desktops/printers/email. This was an insanely ineffective but absolutely necessary use of my time (I was managing a small development team with stakeholder satisfaction kpis), sadly my IT efforts were clearly more appreciated than development.

Hard to convince management that a dedicated onsite IT would be required - especially when they think it is your job already.