I’d recommend reading Enshittification by Cory Doctorow if you’re interested in the subject. He argues that there are some specific causes. To name a few:

• The US has been lax on enforcing antitrust laws, meaning there are fewer and larger companies, and less competition forcing them to not be shitty
• The power of these large companies has also allowed regulatory capture
• Technology has allowed them to do a lot more shitty things and obfuscate bad practices. This includes being able to communicate faster as well as other things.