All of the incumbents were established with network effects long before then, they are very sticky and unaccountable. Not Ma Bell level of natural monopoly but the network effects are pretty strong.
Look at Twitter under Musk, your standard beltway liberal type still uses it even though they hate him.
I don't personally have a lot of respect for the people still using Twitter. I deleted my account before Musk bought them when they responded to a notorious TOS violator being elected President by changing their TOS.
All we have to do to hold the incumbents accountable is log off their service and log on to another one. Nearly 100% of the power in this situation is in the hands of the users.