Ego death, yeah I can see that happening.
I have never felt so strongly about anything in my life, all those things that mattered seem like a distant memory already.
I remember a TV show being on in the hospital after I had our daughter, some show we had probably watched a million times before without thought. We looked at each other and my husband goes, "Who fucking gives a shit?" Lol all that matters is that little bundle of cuteness/screaming/stinky now.
Sleeping is hard, but it does get better. Like maybe 3-4 weeks you want to die, and then you make a game plan and deal with it. You'll figure out what works best for all of you, and go with it. Everybody told us to schedule time, but that never worked for us. His job was to get baby and bring her to me and go back to bed. Then I'd nurse laying on my side. Then when she was done, he'd change her diaper and put her back down, or I would, depending on who felt shittier at that moment in time. It was the least disrupting to our sleep than one person doing everything, at least for us.
Around a month when the kid could sleep 3-4 hours straight at night, I would stay up to 11 or midnight and would wake her up when I wanted to go to bed, feed and change her and put her back down. 4 hours of sleep was pretty much the greatest thing ever at that time. Before, I would go to sleep and she'd be crying in an hour or two, completely interrupting the tiny bit of sleep I was going to get. She got older and naturally slept longer and longer. My bedtime got earlier and earlier and I slept in longer, zero interruptions. Glorious. She's still a great sleeper ever since, and now we're always up before her.
IT GETS BETTER I SWEAR. Hang in there bud! Before you know it, she'll be smiling and making silly faces at you in the middle of the night, making it kinda worth it.