Sally Thompson wrote:
I'm sure it will settle down again. There are some weeds which are easy to
pull up and short-lived, and some which take many years of great effort but
may eventually be banished.

Some wild corners are always welcome in the best of gardens. The best
results are to pull up the borring lawn and let a few colourful species
to settle in and you have a peaceful world of colours and the best of
atmosphere.