> Why should it be bad for consumers.

Usually more competition results in higher quality products and service for consumers; and usually, more conglomeration results in less incentive for the service to improve and therefore lowers the quality for the consumer.

> If show X is only available on service Y, and you don't agree, don't watch it.

This is not how society works. When things get big and popular, their existence pervades through society and all people are affected, not just those who purchase the service or product directly.

> It's mindless entertainment anyway.

This is surely a logical fallacy. Not only is it not likely true, you are dismissing the valid concerns of a person by belittling the importance of the topic itself.