I have no idea if IABU given the wider scheme of things.
Basically, DH is an extreme workaholic and I had to accept long ago that there's very little I can do about this because he becomes highly defensive and I feel out of my depth. He runs his own companies and has no concept of any division between work and family time, but again, this has become normal to me. Also I appreciate it facilitates our lifestyle, so can't really complain.
We have DS1 (12), DD1 (11) and DD2 (9).
My main AIBU is about DH's "moods" which can be quite volatile and very much influenced by frustrations at work, etc. At times, it seems like his mood fluctuates in line with the FT Index, it really does! So because he is so highly strung, I feel like I can't criticise him at all really. He doesn't take critcism well at all, unless I'm really careful. I also have had to compensate for his stress levels at home because I'm aware of the impact it could have on the DC. So basically, I do my best to keep him on an even-keel.
I tend to give him info about the DC on a "need to know basis" and choose a time when he is likely to be receptive. In contrast, he will almost daily want to offload about work to me and will expect me to drop everything at any given moment and give him my full attention for the duration. He gets annoyed, for instance, if he feels I'm not looking at him, even if I'm obviously in the middle of doing something else.
When he's stressed he tends to "nit -pick" about ridiculous things and it wears me down. For instance, yesterday he went on an 8 hour bike ride (one of his many hobbies) and as as he was on his way out he said to me, "There is dust in the top of that door frame" 
. Or this morning, DD1 was close to tears about going to school because her friend is being mean to her and it was the general bustle of trying to get 3 DC out the door - meanwhile, from him, it's "Where did you put xx shirt" (when it's in the wardrobe in front of his eyes) and "Did you not have time to do the windows?" and other pointless questions which feel like digs and could just wait.
I should add that the house is NOT dirty or a mess. I have a cleaner twice a week and I clean / tidy up in between. I never ask him to take any house related stuff on, but when he's in one of his moods he will find the one thing I forgot to do.
In contrast, I know DH would do anything for me. He's very kind and extremely generous, very affectionate, always tells me he loves me and so on. All my friends think he's fantastic.
AIBU because, on balance, I'm very fortunate. Should I continue to let a lot of things go over my head or should I start to challenge him more?