I'm pretty sure it's standard practice at these companies to never let front line call center staff acknowledge known problems. Sometimes, the automated phone menu will give you a recorded generic message that they are currently experiencing a service issue, but that's intended to convince you to hang up and patiently wait for them to sort their shit out. I've never had a front-line rep be at all useful in diagnosing a real problem.
I guess I need to remember the ISP I work for here in Australia (front line tech support, and then network operations physical security and infrastructure) was widely recognised as the best ISP in Australia multiple years running, so I shouldn't use it as a baseline expectation.
Network congestion issues shouldn't be handed off to field techs to check local loop (last mile) and CPE (Customer Premises Equipment.