Why the progressive party( when Thomas Crerar was the leader) fail.

I looked on Wikipedia but I didn't understand it. Can someone explain or summarize it in one or a few sentences

It looks like he tried to form an alliance with the Liberals. When that failed, the Progressive party died.

http://www.thecanadianencyclopedia.ca/en/article/thomas-crerar/

The Progressive Party, under the leadership of Thomas Crerar, faced multiple challenges that led to its failure. Some factors include divisions within the party, poor electoral strategy, competition with other political parties, and a lack of support from the rural population. To understand the detailed reasons, I recommend reading relevant sections on specific challenges faced by the Progressive Party during that time on Wikipedia or other credible sources.