RitchyBestingFace
"8 hours sleep with a burst of getting up to give a bottle is NOT 'sleep deprived' FFS."
He is not getting 8 hours sleep or anything like it.
The first feed STARTS at midnight. Feeds take about half an hour. OP said the baby "usually" goes straight back to sleep. So not always. But if it does, then the earliest he's going to bed is about 12.45am. Possibly not til 1.
He's then up again 2 hours later, to do a feed that starts at 3am and with a bit of luck will be back in bed by 3.45am. Probably not until 4 on a bad day.
Then at most, another 4 hour stretch of sleep before getting up at 8 - though chances are it's not great quality sleep from 6-8 with a toddler, a baby, and OP all up and about.
So at most it's 6 hours of sleep, with a big break in the middle, so NO deep sleep at any point, and this is every single night of the week. Followed by a drive to work, a full day's work, a drive home, then bath and bedtime for 2 kids (alone, while OP recovers from her busy day of getting pedicures).
He is NOT getting 8 hours of sleep.
Incidentally:
Not sleeping enough and not sleeping well is not OK. As a matter of fact, there is quite a price to pay. It may surprise you to learn that chronic sleep deprivation, for whatever reason, significantly affects your health, performance, safety, and pocketbook.
www.webmd.com/sleep-disorders/features/important-sleep-habits