I too had a relationship where my husband was away a lot. When he wasn't there, life went quite smoothly, the children and I got into a routine and I made a lot of friends on the Internet, because that was the only adult conversation available in the evenings. When he was away, we were barely in contact.
When my husband was home, he tended to be critical about things, but never really helped. The children were my job, as was the house. I almost never had a break, because at weekends, he would lie in, because that was 'his time off'. He thought that as he worked hard, he deserved a break. But he completely ignored the fact that I never, ever had one, because my jobs (the children and house) were there to be dealt with, all day every day.
My experience was that when he came home, there was extra work. He made mess / dirty clothes / ate food. I couldn't talk to my wonderful Internet friends so much, because he was there.
And then, we'd go to bed and he would want sex and that too was another chore I had to get to, and how could I fancy someone who thought so little about me.
I can't tell if any of that fits your situation OP. You haven't answered any questions about how much you do, so only you know whether your situation might be similar.
I eventually left him. That was the first time he really started listening.
We are now back together. When he's away, we speak all the time. He phones daily and we message continually, just silly little things, but it makes all the difference. He comes home with gifts for the family. Items of food from wherever he's been that mean that often at weekends, I don't have to think about what to eat.
It's obvious now, even when he's away, that I am his priority.
He stopped moaning about the house when it wasn't tidy. Recently, after further discussion, we have an allocated time when everyone tidies and cleans (our children are a bit older, but not much).
Because he is now focussed on me (and the family), I no longer feel that sex is a chore. We have fun together and make time for each other. Instead of the trips being a relief, life is better now, both when he's away and when he's here. Better still, now the children are older, I just occasionally go with him. I'm fairly sure if he could, he'd take me whenever he was away.
As I said before, you haven't really responded much about what you do when you come home, so I don't know whether any of that rings true. But it is possible to come back from an almost dead marriage. It takes effort on both sides.