Good lord, calm down everyone. The CLB book says over and over again, the routines are just guides. It says never ever ever leave a hungry baby to cry, it says the routines will need to be adapted to suit the baby. It isn't some trudy king style park them in a pram in the back of the garden and leave them to cry for hours thing. It's just trying to find something that minimises the amount of crying each day for everyone. Although gf does tend to over analyse everything imo, but then that's her, and I'm me.
For example, with both of mine they could never stay awake in the early days, and dd2 had about 5 or 6 naps a day. Gradually eased into 3 naps over a few weeks. Dd1 needed more sleep than suggested, otherwise she was cranky, so she got it. Dd2 didn't sleep as much (after the first few weeks), so she had less. Etc etc.
The problem with being a first time mum, if you've never been around babies before as so many have, is that you are clueless (no offence, I was) and don't have the confidence to go with the flow so much. You also think that one bad day means it will be hell forever more.
Books, of whatever kind, can be a useful prop as you muddle your way through. If it's not working for you, then have a read of something else or do your own thing, no biggie, everyone does it differently.
Well done OP for getting that confidence to decide it's not for you, and good luck with finding something that does work for you. For specific issues, eg cranky evenings, there's huge amounts of advice, experience and support on mumsnet.