What does the three-year saga indicate?

Finally it seems a deal has been reached between the United Kingdom and the European Union.Yet before people can heave a sigh of relief that the three-year saga is finally coming to an end,seemingly with a whimper rather than a bang,MPs voted to withhold approval for the divorce deal unless and until the legislation required to ratify the treaty is passed through Parliament,triggering a law demanding the prime minister ask for a delay to avoid the risk of a damaging "no deal" exit.