I've mentioned it before but thus is what happened in Portugal last year.
Right wing party wins more votes but not overall majority.
Left wing parties did get over 50% in Parliament.
Right wing party asked to form government, but can't make deal for majority and is shot down by left.
Left wing parties make deal, but not coalition with the most voted left wing party, who was asked to form a government by the President on a second round.
I wonder if the UK will have a similar scenario.
Hopefully not as Spain recently or Belgium a few years ago.