That badly misstates how deep the divisions in the country were, and how far back the discontent went. Secession was caused by much more than pique at losing an election.
Not really. They tried to win by force of arms what they thought they lost at the ballot box: a secure future for slavery and the expansion thereof. (No slavery AND no West, no war) It really isn’t much different than a kid “taking their ball and going home.” At it’s most simplistic, they thought they lost and instead of working within the system they decided to try to break the system in order to get their own way. The metaphor works wonderfully whether you think slavery is the main cause, or the TRR, or tariffs, or.... anything but slavery.