Luftwaffe Claims/Losses September '39 - June '40

[Broncazonk]

I've been working through the history of this and according to Williamson Murry in Strategy for Defeat, from May to September, 1940, the Luftwaffe twin-engine fighter force (Bf 110) lost between 94% - 96% of it's initial aircraft strength, that is: were destroyed from all causes. (In comparison, Ju 87 (Stuka) losses were 50%.)
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The ~95% loss rate [in less than 5-months] on this twin-engine airframe would seem to be clear definitive proof of something. No? I mean, what the hell??
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Why did the RLM/Luftwaffe stick with the Bf 110 day fighter, only to stumble around for several years with the even worse Bf 210 and then go back to the Bf 110?
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A lot of good Luftwaffe pilots died over this absurdity...
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Bronc