Its got to the point where its just painful to use in the mornings and
unsurprisingly the vast majority of people bail out at Finsbury and get on
the victoria line putting added strain on that.

Why is it so slow and so unreliable with frequent train gaps of 5 or 6 minutes
the rush hour?

Trains?
Drivers?
Signalling?
Dwell times?
Stations too close together in the centre with too much stopping?
All of the above?