You are of the opinion that it is reasonable for a company to expect you to read, understand and fully agree with a contract that consists of countless pages of opaque legalese and that you have no say in whatsoever, just in order to use a service that's arguably a necessity to participate in public life?

The EU does not seem to share that opinion, and puts some restrictions on these types of 'contracts'. Are you really concerned that this is somehow unfair towards these companies? Companies that retain whole teams of lawyers to create a contract that hardly any of its billion counter parties (individual consumers) can fully comprehend, let alone push back on?