hi dezzer, men will never understand unless they are left with baby for a whole day with no help! (apart from the few that bring up the kids by themselves - go guys)
i suggest you try and talk to him when he is in a good mood, be calm , make sure you know what you want to say and don't get angry as he will just get defensive.
things do get better, i promise, you get used to looking after baby and become more in-tune to their needs. if he/she has a lot of wind, you can buy drops (infacol) which help with this and also anti-colic bottles (i use tommee tippee closer to nature bottles with built-in valve)
as for staying at his folks, if you feel this is not what you want, then you have to tell him. do you have any close friends or family living nearby that can come over to help whilst he is away?
at the end of the day, you are the mum and you know best for you and baby. if you get really stressed out (i still do) when baby is screaming for apparently no reason then take a few deep breaths, walk away for a minute or so, have some tea, if baby is fed, clean and cosy there is nothing else you can do, sometimes they just like to cry. do not blame yourself for this, and try not to get too stressed as baby picks up on this too.
i'm here if you need to talk, this site is a godsend for us mums!
keep smiling xxx