The referendum result created something of a constitutional problem because the required legislation, to honour the totally unexpected outcome, was not passed. All along this has created a problem of different groups arguing what is paramount- The referendum outcome, or parliament.
The majority that voted for brexit rightly feel cheated by Parliament, who have shown their disdain for the outcome by constantly thwarting it. The linked article above raises some interesting points that could be argued as positives.
What Bercow has done is truncated the time for the boil to be lanced. The present situation is intolerable.   The PM's present course of action is a progressive watering down of the departure terms to the extent that it will be a brexit in name only. Tied to the EU legislation with no seat at the table to dispute it.
May needs to call a snap election. Any other path of action will leave the electorate feeling alienated from their representatives for a long time into the future.
It will be interesting to see how it pans out.