Been living in Munich for the past 9 years, with the exception of the S-Bahn, it's still very good. I've never felt the need to own a car (only the occasional rental for moving or trips to more remote areas). Anecdotally, I know colleagues and friends who also make do without one, even those with kids.
Only city I've experienced better is Singapore (where I lived for ~7 years), though people complain all the same :D
In an airport, people complained that luggage delivery was so slow after landings. Airport measured the time, agreed with passengers and increased workforce to reduce waiting times substantially, but the complaints didn't reduce.
Instead, they routed passengers through a longer path, so their luggage was waiting for them when they arrived, and nobody complained about the longer walk.
We, the humans, are interesting.
I've never formally complained about luggage arrival delays, but I have definitely noticed long walks. Some ridiculously so. I suppose I should complain, but to whom?
OTOH, you can't make things easier if the airport is really big. e.g.: Rome, New York, Amsterdam (to an extent) and Istanbul.
I prefer to take a later connection flight to prevent these runs, though.
The London underground is indeed a redundant spiderweb. But the article focuses more on mainline trains, which are much more constrained.
The only way right through central London for these trains was north-to-south, the Snow Hill tunnel: Kings Cross -> Farringdon -> City Thameslink -> Blackfriars -> South of the river. This can only be a bottleneck.
But now there is the Elizabeth line east-to-west as well.
I suppose this is more a problem of sharing track than through running, but I just found it funny to see Munich public transport described so positively.