I have hideous asthama - as in ICU admission asthama, and nubulisers at home etc. I have kids, and work full time and I would never under any circumstance expect ANYONE to drag kids out in the evening to pick me up everyday. As an emergency or if I was ill or there was a problem great rest of the time I am a big girl and can get my butt home on my own thanks.
Ok, lets be proactive and see if we can help you out.
The routine thing, is difficult you have two (three 
) kids and a tight schedual.
What about preping a snack for your eldest before you go and pick him up. Then bath whilst baby is asleep. Then BUY a slow cooker (from all the money you are saving on bus fares) and cook a one pot dish that is ready for when you get home with DH? Something you like preferably as a treat for all the running around. Feed everyone then put the oldest to bed. Then give DH the baby and go and have a bath or something.
Alternatively, how much does the bus cost and how much does fuel cost?
YOur DH is being a twit - honestly a big twit.
A man came home from work and found his three children outside, still in their pajamas, playing in the mud, with empty food boxes and wrappers strewn all around the front yard.
The door of his wifes car was open, as was the front door to the house and there was no sign of the dog.
Proceeding into the entry, he found an even bigger mess. A lamp had been knocked over, and the throw rug was wadded against one wall.
In the front room the TV was loudly blaring a cartoon channel, and the family room was strewn with toys and various items of clothing.
In the kitchen, dishes filled the sink, breakfast food was spilled on the counter, the fridge door was open wide, dog food was spilled on the floor, a broken glass lay under the table, and a small pile of sand was spread by the back door.
He quickly headed up the stairs, stepping over toys and more piles of clothes, looking for his wife. He was worried she might be ill, or that something serious had happened.
He was met with a small trickle of water as it made its way out the bathroom door.
As he peered inside he found wet towels, scummy soap, and more toys strewn over the floor. Miles of toilet paper lay in a heap and toothpaste had been smeared over the mirror and walls.
As he rushed to the bedroom, he found his wife still curled up in the bed in her pajamas, reading a novel.
She looked up at him, smiled, and asked how his day went. He looked at her bewildered and asked:
What happened here today?
She again smiled and answered, You know every day when you come home from work and you ask me what in the world I do all day?
Yes, was his incredulous reply.
She answered, Well, today I didnt do it.