It's so frustrating!
Not to mention that garbage bags meant for cars are either expensive and/or too flimsy to hold up.
I really love projects that use items I might otherwise throw away. So, why not use garbage to collect garbage?!?
I found an empty cereal box that fit into the bottom of my car door, cut the front a bit lower than the back, covered it with pretty paper, and lined it with a bag.
Place it back into the door and you have a garbage can for everyone! It's easy, inexpensive, and convenient. No more complaining about garbage!