This collection is a really good breakdown of how the reputation of Spartan society did a lot to carry them through most battles, and how the actual Spartan society absolutely sucked for everyone. One of the things that really stood out to me in regards to how their reputation carried them was that in hoplite battle, you arranged your army by strength from right to left, meaning the right side of your army is facing the left side of your enemy. Essentially the goal of the left side of your army was to survive while the right side of your army was destroying the left side of theirs. Because of the Spartan reputation, it was common for the left side aligned to face their forces in combat would flee before even engaging, leaving an opportunity for the Spartans to flank their enemies and destroy their armies. So Spartans won a lot of battles not because of their immense military capabilities, but because their enemies would allow them to flank based on reputation.

Sure, but if the Spartans were shit at war they wouldn't have had the century and a half of being undefeated in decisive battle that would form the Peloponnesian League from their conquered subjects in the first place.

The League that then led the war against Xerxes, and eventually conquered Athens, Thebes, and Corinth, a hegemony that would only be broken by the man whose tactics would teach Phillip II and his son what's-his-name how to conquer most of the ancient world.

That simply is not being shit at war, even if a critical analysis shows the Spartans did not perform notably better 1:1 than anyone else without trading on their reputation.