You could of course sue Google, but that's an extremely expensive and time-consuming option, rarely worth it for a mere consumer. Going to court certainly won't make your suspended account become unsuspended any quicker.
I think there are online business who are essential enough that some consumer protections are applicable. Very few reach the level of monopoly that utilities have in my mind, and even those it isn't clear to me that they are "natural" monopoly like utilities, and as such other antitrust approaches may be more beneficial.
However, I think there are a number of competitive, yet essential services online that deserve a legal protections regarding service termination. Identity providers absolutely fall in that category IMO - it is unacceptable for example for Facebook to lock your account in a manner that prevents you from not only using their services but every other third-party service which you authenticate using "Logon with Facebook". I think email is another that rises to this level. At a minimum email providers should be required to forward mail for a fixed period of time after choosing to stop doing business with a customer.