> But who get's to arbiter the content of one's character?
Only you get to make the decisions that define your character. Others observe your choices and choose to associate with you, or not to.
> And by what metrics are so perfect they won't be abused or change in 5 years?
There are no metrics. The free, global, unfiltered publishing platform is free to decide that they just don't like you. Nobody is entitled to free unfiltered publishing of their content.
I should note that if you're willing to pay, there's basically nothing that you can't get published on the internet. For some reason people get the 'free' in free speech confused with zero-cost. You can publish whatever repugnant material you like, you just don't necessarily get the eyeballs that some believe they're entitled to.