Like some of my strongest memories are of leaving notes for my Mom about how I felt neglected and was in <x> room waiting for her just to BE there with me. She'd last about ten minutes before she'd begin multi-tasking. Not because she was a bad mom but because she just had so. much. to do with five kids and a full-time job.
If you're going to have a large family older kids have to take on some of the emotional labor or the younger kids are totally shafted.