Was the crying it out you mentioned at night too and was the crate in your room?
Yes to both. Back then the advice was into the crate at bedtime and ignore any resulting noise except for offering occasional toilet trips during which the puppy is completely ignored.
Unfortunately my puppy just screamed herself hoarse literally all night, getting more and more distressed.
It was upsetting and exhausting for me but traumatising for her. She ended up very scared of both crates and being left alone. It wasn’t until she was about two years old that she could be genuinely happy either in a crate or being left.
With my subsequent puppies I’ve slept downstairs on a sofa bed with the pup on the bed with me. As soon as they start shifting about during the night I whisked them out to the toilet (with very quiet, gentle praise for going outside) and got them back into bed pretty much before they were fully awake so they settled back down to sleep straight away.
It’s much less stressful for everyone involved and helps the puppy feel secure and settled much quicker with no risk of them associating either night time or being alone with being in distress.
Having them with you in the early days doesn’t mean they have to be on (or in) your bed forever. Once they’re fully settled in and are sleeping though you can start moving them to where you want to sleep long term, or gradually retreating to your bedroom if you’ve been downstairs with them. Mine all still sleep on my bed as adults but I know I could get them sleeping quite happily downstairs if that’s what I wanted.
You can use a crate right from the first night if you want but you need to do it in a particular way to avoid upset. It’s better described on the guide from that FB group but in short you wear the puppy out, make sure they’ve been out then pop them inside the crate (which needs to be right next to where you’re sleeping) once they’re conked our. You stay by then until they’re deeply asleep then get some sleep yourself until they wake you up because they’ve woken needing the toilet. Quiet, unexciting trip outside then back into the crate with you again waiting until they’re deeply asleep before shutting the door and getting back into bed.