Yes, it's an age thing. When I was a teen and didn't have an after school "event" to deal with, I went home and either talked on the phone to friends or watched TV. If I was in the middle of a book, I'd read. I'd read for hours on end, and not turn off the light until 2:00 a.m. some nights. But I didn't always have a book I was into. So, TV. Mindless, reruns of Love Boat or Fantasy Island, or Leave it to Beaver and the Brady Bunch. Just.. vegging out.
Your brain is done some days after hours of forced alertness and attention at school, not to mention the social aspects of being "on" all day long. I'm an introvert, and it is EXHAUSTING to have to be in rooms with lots of people all day long. Truly. It isn't that I can't. I can. I did. But it is exhausting!
My daughter is a good bit like me. She's 14 now, and her daily after school activities have slowed down. A year ago she was doing karate 2 or 3 days a week, multiple classes in a day even, and piano one day a week. She also played piano at church every Sunday and spent time prepping the hymns for that. Plus her school work, Jr. Beta volunteering, etc.
This year, she's a freshman, and due to her marching band commitments first semester we dropped both karate and piano. (During marching season they stay after school for 3 - 3 1/2 hours 3 days a week. And perform every Friday night, requiring them to return to school before 5:00 pm). She's taking all Honors and/or AP classes, plus a 2nd math class this year. She's constantly swamped with reading assignments for AP World History. She also is part of a Literary club that meets in the mornings before school starts (at about 7:30 a.m.) at least once a month. So there's reading (and writing) for that.
So, when she gets off the bus (at 4:15 pm).. I let her do what she wants mostly. Sure, I remind her to put away her clothes and take care of any other routine chores, but I don't pile on. She takes a decompression break before she tackles homework. After dinner (or sometimes before) she's hitting the homework/studying. Then it's bedtime (of her choosing) and she'll sometimes watch a 30 min show or listen to music or text with her friends for awhile before she turns out the light.
She's a good kid. A hard worker. And she demands a lot from herself. I'm not piling onto that, but I'm also not ignoring any chores she was required to do previous to now... she still has those responsibilities. But if she comes home and needs to just become a zombie in front of the TV, I'm not going to stop her at this point. Warmer and longer days are coming soon, and when they arrive, I'll encourage her to take a walk or do some physical exercise outside in the late afternoon hours. But for now, I think it's ok that she takes care of herself mentally.
Perhaps you can establish some timelines with your husband so this is less of an issue for him. A family timeline/schedule if you will. From X until Y is personal time. From A to B is time for doing chores/picking up/ helping with dinner as needed, etc. From W to X is homework time. And so on. Remind husband that when he first walks in the door, he likes to be greeted, and have some time to decompress, maybe change clothes, have a glass of something to drink, glance at the paper, chat with you, whatever--- before you start in on him needing to do this or that to help, or "the trash needs to go out" Or "Did you see the bill that came today?" or whatever.
Kids are people, too.
-- ETA
Oh, I also have a senior. He works 22 or so hours per week after school at an auto shop. He often doesn't get home until 6:00 or 6:30. He eats dinner, takes care of any homework he has left, and spends most of the rest of it either on his phone (on the sofa or in his room), playing video games (online with friends) or watching Netflix (Seinfeld, Parks and Rec, The Office, etc). He does his chores without complaint, but I don't usually ask much else, except maybe on the weekends.