You do realise that £25 in 2020 is worth £32 today? Which means the price increase over the last 4 years has been only 9% prior to this increase? Or the equivalent of 1-2% per year?
Sorry, I hate to defend a multi billion dollar corp. But I experience this with local small businesses all the time who are afraid to put their prices up over the last 5 years by just a few quid while the megacorps don't give a ****. The small businesses think it's okay to keep charging the same while all their costs go up and it drives me insane.
Blame whoever is in control of inflation for most of these cost increases. Vote your government out if they're ******* you over. I agree it ******* sucks the prices are going up but doorbell subscriptions are not an isolated use case.