Since when?If you bought a game in eshop in EU, then hack, then banned, they cannot ban you even if you violated TOS, eu laws forbids it, as they are pretty much obligated to offer you to download that game for 2 years that you aleardy payed, or offer you a workaround to download that game from other point, no matter the TOS, and in eu you do not accept a TOS, a TOS en eu is more of a suggestion than a law binding thing
7 covers the short notice thing
https://europa.eu/youreurope/citizens/consumers/unfair-treatment/unfair-contract-terms/index_en.htm
Equally at the bottom of that page
"Contract terms that are unfair under EU law have no legal or binding force on consumers. As long as the unfair term is not an essential element of the contract, the rest of your contract (but not the unfair term) remains valid."
and at the top
"Under EU law, standard contract terms used by traders have to be fair. This doesn't change if they're called "terms and conditions" or are part of a detailed contract that you actually have to sign."
Ergo contracts are very much a thing.
The not after point of sale thing (but at point of download/sign in/sign up/... being valid) likely being the part in 9 in the list of Potentially unfair terms that states
"Terms which bind consumers even though they could not easily have been aware of them before signing the contract."
The two year warranty law
http://www.thisismoney.co.uk/money/bills/article-1677034/Two-year-warranty-EU-law.html
More for business interactions but expands upon cancellation of services a bit
http://europa.eu/rapid/press-release_MEMO-18-3373_en.htm
I can't find the ruling about compensation for shuttering of online services and the one about no returns therefore but they would only be minor perks here.
and to finish it off might as well have
https://www.gov.uk/guidance/unfair-terms-explained-for-businesses-full-guide
Various parts of those links cover violation of contract (which remember is for online services in this instance, not the console itself and you would be hard pressed to argue they are one and the same when carts exist and are as readily available as they are here).