Really difficult indeed, subscribed to the student sub a while ago, was cheap compared to normal prices for the whole suite. However getting out of the deal was forcing me to pay up the rest of the yearly subscription price, yo could get around this by downgrading the subscription to photoshop only and then it would let you cancel without any additional payments. Such a shitty dark pattern to do but it’s Adobe so it’s expected 🤷
Be careful and double / triple check on https://help.steampowered.com/en/accountdata what information is stored on your account, especially chats, payment information, purchases, subscriptions and so on. But I agree regarding TOS if they ever find out the account will be locked most likely.