There is one on the list that is "the long con of Britishness", not sure how the rest can be seen as "anti British".
Then in the lockdown with a small child, with one nice walk nearby, walking it again and again it goes so boring - it resonated as something funny, it seems like people are looking for things to be offended by?
It's also funny as Guardian readers are right in the "going for a walk" demographic - it's poking fun at themselves.