Read the post again, you are missing the point. The price itself was the last drop. The overall experience they got, for a company that has been featured on Google Maps promotional publications, was abysmal.
Suppose your government provides electricity for free below a certain threshold. Suppose you exceed that threshold. Suppose a rude person calls you up and asks you to pay. Suppose you can't afford it.
Should you then complain that they were rude and how it was their rudeness that caused you to switch providers? Or do you simply explain that you found a cheaper provider that aligned with your long-term goals? Was the point of the post to try to give Google customer service a black eye? Because, to me, all it did was betray pettiness.