I feel sacking customers got really popular during Covid and continued after.

Many phone systems have a thinly veiled threat about zero tolerance policies, to treat staff with respect, and in the case of certain government agencies here in the UK, that they will refer cases to the police. The same is repeated on written posters in eg doctors and dentist offices

Just a coincidence I’m sure but I find employees (especially on the phone) even more condescending and unhelpful these days