One thing to add, if you terminate your contract early, you’ll get a “mark” on your “membership”, which makes it increasingly harder to cancel subsequent contracts. Those marks don’t disappear over time either, it seems. This is speculative, but i did talk to someone here who tried to cancel early but had a very different experience than us (we cancelled our current lease early, too) – the only difference being that they terminated a contract many years ago prior.
If you can help it, i’d suggest not to cancel early. Waiting times, prices and potential drawbacks for future interactions don’t seem worth enduring, if the issue is “works, but a bit cramped”.