[MaxBarraclough]

It sounds like your complaint isn't that Netflix has a 'churn' of available content, but that they don't offer much content of interest to you. If that's the case, then sure, it makes good sense to cancel and either go with another subscription streaming service, or buy/rent what you want to watch. There's not much Netflix can do about that, short of just spending far more money on licensing content, which would presumably mean raising prices.

I've found that disc rental (by post) can be a surprisingly good option, even if it's been mostly forgotten with the rise of streaming. The available library is better than any streaming subscription is able to offer.

> I generally prefer to watch a movie over a TV series

Shouldn't this mean you're less inconvenienced by content churn? If you're part way through a series and it gets removed, that's annoying, but this doesn't really apply to movies.