Neil Williams wrote:

London's transport system is IMO *just about* workable, but it is in a
lot of places embarrassing for a world-class city. Hamburg, for
example, has the kind of system - highly punctual and reliable, clean
and lots of capacity - that London should have.

The state of the track on the sub-surface lines, and the hunting
problem on the DLR are good examples of how poor it can be.

Another example is the constant bangs and thumps from underneath the
train, and a generally "bouncy" ride, on the Metropolitan line services
to Uxbridge. Admittedly, the stock is about 45 years old, which may
explain it.