The reason that big tech is corrupted is mass media and activists (here I mean anyone who pushes for their company to do good things rather than just neutral thinhs) within the big tech organization.

The (non-rightwing) news orgs had constantly been going on about the evils of Trump and racism and fake news and virus misinformation how very bad it all was, the activists were convinced (because most people don't know how the "news" sausage is made and how it misleads) and pushed to stamp out what they saw as dangerous behaviour. The solution is probably to stop trusting the news media and bring back freedom of communication.