One of the problems the BBC is facing is that the UK is drifting rapidly towards the same sort of hyper-partisan political environment that we are more used to seeing in the US.
The Conservative party moved to the right, as have right wing media like the Mail and Telegraph. They want to therefore redraw the political map of the UK, pulling what used to be considered Centrist further towards them.
In flirting with Corbyn, Labour pulled Left, with many supporters berating the BBC for not going with them (and therefore being tools or stooges the right wing government).
As people are increasingly pulled to those extremes they get angrier at the BBC, saying it doesn’t represent them.
Anything broadcast by the BBC which accords with their political views isn’t really noticed, it just looks like “common sense at last”. On the other hand, anything broadcast by the BBC which appears to run counter to their political views acts like a red rag to a bull - each instance is noted and remembered.
Add to that the fact that so much discourse happens over social media, where people always become inclined to act more angrily in order to be noticed, and you have an incredibly febrile environment, full of people ready to take offence and kick out.
To operate as an impartial public service broadcaster in this situation must be incredibly difficult. If we lose it though we are condemned to a future that looks very much like Fox News or OANN.