Terms of Service tries to be legally document, enforceable across borders. Its not related to copyright, so there aren't any treaties to unify each countries laws. Also, because it is not copyright, ToS get put into the all covering service/contract law. Where I live, Sweden, those laws was written in 1900, and is in my view 100% incompatible with ToS or EULA's.
To take one example, they require that the person providing a contract makes sure that the other party is fully informed of the contract, and that the other party is benefited from signing the contract in relation to the terms. Reading the history around it, they basically makes in unlawful to knowingly "trick" people to sign contracts that are one-sided.[1]
On the "trick people to sign" part, I am also slightly considering the fact that companies often know how long time someone spends reading an ToS/EULA. They know when, and how many people can't have human possible read the agreement before pressing OK. When MMORPG clients update a new agreement, people are logging in seconds after its possible. If you knowingly are going into a contract with someone who hasn't read and understood the terms, its hard to claim that the contract was made in good-faith (jfr BrB 9 kap 1 §).
All in all, ToS and EULA's just seems to me as an broken concept.
https://lagen.nu/1915:218 30§ and 36§