There still are some high-quality internet-based products/services, but the most important of them are not exactly commercial, or they are even illegal, e.g. various digital libraries with old publications, archive.org, Wikipedia, Anna’s Archive, etc.

Also there are many online shops that are the best option for purchasing various things.

The greatest decline is in the search engines, which not only are overwhelmed by sites with fake content, but they generate fake content themselves, in the form of stupid answers that are offered instead of the real search results, whether you want them or not.

If you know precisely the Web sites that you want to use, it is still OK, but when you search something unknown, it has become horrible.