There's zero agreement happening when you visit a website.
Assuming you didn't do something actually illegal while using their service, without a contract the most they can do is ban you from the service, or try to.
It is legally binding. By accepting ToS, or using service with ToS, you are entering a legal contract. And as long as ToS isn't breaking laws (like Digital Services Act in EU, or Online Safety Act in the UK) it can be fully enforced.
TOS is a NOTICE, not a contract.
There's zero agreement happening when you visit a website.
Assuming you didn't do something actually illegal while using their service, without a contract the most they can do is ban you from the service, or try to.