No no... They ARE bad parents... Good parents would work something out to spend time with their kids and make sure they're not left alone... Their youngests shouldn't be raised by their big brother (or a baby-sitter) it's their own fucking job
This one :
https://mangadex.org/title/d3eb2cdf-be1f-4c11-bbb3-a59ce0e32180/yankee-kun-to-megane-chan
And even with the epilogue that released a while later it's still ass