It could be him under duress.
Much of the time contract termination can be reasonable as long as you make a solid effort.
Once I signed a lease and got fired before my actual move in. I was honest and got a full refund on my deposit.
The landlord could said “Well you owe us the full amount , lol”, but no reasonable court would enforce that.
Even if, good luck collecting I have no income!
If you don't want to be in a contract especially one just signed, typically most people will typically understand and let you of the hook, as long as entrapment is not their business model like telcos. This is mostly reflected in common cool-off period provisions, i.e provisions in the contract to terminate within a week or two.
Right to cancel should be a thing, if I can subscribe online I need to be able to cancel online
I figure that if it was a legal requirement, most would comply but quite a few would still think it was an imposition. So if there was a law mandating an online unsubscribe option, it would need teeth. $10,000 fine per user per day that you don't have it might work.