With Elon Musk giving the Hitler salute, Instagram blocking Democrats related searches and the United States turning into an oligarchy it is time to say goodbye to Big tech. The only way to stop the oligarchs, is to hit them where it hurts. Kill their businesses, and stop them from becoming trilionaires. Say goodbye to Big Tech. It’s possible (though not painless).
Twitter/X, Meta and Google are in the advertising business. Without users, they have no audience to sell. Without advertisers, they loose their income. (If you run a business, you have an individual responsibility to stop advertising there to stop funding this shit.) Saying goodbye is easy: use Mastodon or Bluesky instead of X. Use Signal instead of WhatsApp or Facebook Messenger. Use DuckDuckGo (or another search engine) instead of Google. Stop using Gmail. Get yourself a domain and host your email there. There are no real alternatives for Facebook or Instagram, unfortunately.
Amazon and Microsoft sell services (cloud, operating systems, office suits). We should stop buying them, but alternatives are not always easy to find, and sometimes you loose on usability. For simple cloud storage, NextCloud works, or consider end-to-end encrypted cloud storage providers like Tresorit or TeamDrive. LibreOffice is an open source Office suite that can read and write Microsoft Office documents (Word, Excel, PowerPoint). But note that collaborating with people that still use Microsoft Office may be problematic. Linux is an alternative operating system, but only for the non faint of heart.
For true, sustainable, change we need non-US governments, institutions, organisations to use their buying power to stimulate the development of viable alternatives. These alternatives should be protocols, not platforms. (There is no use replacing one monopoly with another.) For existing platforms, governments should force them to become interoperable (as the Digital Services Act in Europe aims to do).
For Apple, stop buying their devices. If you do not want to run Microsoft Windows, this means choosing a Linux laptop/desktop. For mobile devices, there are alternatives that run /e/OS, a deGoogled version of Android. So when you need to replace a broken or outdated device, carefully consider your options. Again, there is not always a better alternative (unless you really want to compromise).
Oh, and for the love of god: stop buying Tesla. There are plenty of other, better, electric cars out there.