My seven month old is an awful sleeper. He used to wake up 15-20 times a night screaming. I called the pediatrician a million times until we finally got in with the gastroenterologist. He's been on 5 medications for reflux, but he still sleeps extremely poorly. I had NO idea babies could have such a hard time with sleep before this. You always hear people idealizing a baby's sleep.
I see this all the time in my sleep disorders clinic: parents who struggle not only with getting their child to sleep through the night, but with their own sleep deprivation which results from the child's sleep problems. This is then made worse when they blame themselves for "doing something wrong," and are embarrassed to seek out help.