Hamas was voted in 18 years ago with less than 45% of the vote on a platform of clean government and keeping peace with Israel based on the 1967 borders.
Hamas today is not the Hamas that was voted in, very few Palestinians alive today voted for them.
https://en.wikipedia.org/wiki/Demographics_of_the_State_of_P...
That's the reality which anti-Israelis are determined to ignore.
% of the popular vote doesn't matter. US presidents also get voted with less than 50% of the popular vote.
Their platform isn't and never was peace within the 1967 borders. Again that's the reality anti-Israelis are determined to ignore.
If Hamas believed they would win, wouldn't they be more inclined to hold elections in the territory they control?