When my wife went back to work and I took over taking care of our 2 month old, I decided to do the whole “cry to sleep” thing. I put her down when she was close to sleep but not there yet, and basically let her cry. If in ~10 minutes she wasn’t asleep I’d go pick her up and try again.
Full on crying fits were rare. She usually squawked and did some light cries. Within 2 or 3 days not only was putting her to sleep way easier but she started sleeping a full 11 or 12 hours through the night.
We still use a white noise machine, dark room, and a sleep sack (sometimes a weighted one). I think I’m going to start cracking the shades to her window during naps so she is better at napping in homes without a dark room.
All that said, there’s a reason I had to do that and not my wife. I could tell she was itching to go in at her distress, to the point where I would take the video monitor away from her. From what I read we also had better luck with it than most in that usually it takes a good week or so for it to work.
TLDR: Stop being such a millennial and let the baby cry ;)