I so disliked my stay that I wish I could give it no stars instead of one.

When we arrived at the address on the listing, it took us 15 min to realize that the listing address was completely wrong. When I checked messages from the host, he had given me a different address but what was so frustrating is that the host did not message us that the address on the listing was wrong and go to this new address. We messaged the host and he replied right away that he could not figure out how to change the address on his listing when he moved, so the listing had information on the correct address with the address of his old apartment. This is absurdly wrong and against airbnb rules. I have hosted on this platform myself for over 2 years, so I know the rules. Moreover, I called airbnb to find out why the host could not change the listing address to his new apartment. The airbnb rep said that all the host had to do was call airbnb to change the address on his listing! Because of this confusion, it took us 30 min extra to get entry to the correct listing.
When we arrived at the correct address, the apartment was on the ground floor with no security gate whatsoever. The apartment was completely open to anyone on the street. Santa Monica is a big city in which anything can happen, and the apartment was located on a busy major street. The front door was so flimsy looking that it seemed that anyone could kick in the door and gain entry. All it had was a bolt lock, no security chain or additional locks. But none of that mattered because you had to leave windows open for air circulation, and, due to no security gate, any thief or violent criminal could cut the screens in a matter of seconds to the big aluminum windows to the back bedroom bordering an alleyway! We value our lives and our $5,000 worth of electronics that we brought with us.
Our host told us that we could park on the busy, main street out in front of the apartment with the permit he had left for us. However, he failed to warn us about street cleaning (we don't have this where I live; the signs were sparse), and I got a $64 parking ticket.
The sofa bed and the bed in bedroom were extremely uncomfortable. The sofa bed was ancient with actual metal springs and a thin mattress with no mattress cover, which meant that my son had metal springs poking into him with only a bottom sheet between him and this old, disgusting mattress. The host needs to buy an IKEA sofa bed, which is inexpensive and comfortable.
The host needs to replace all his old polyester stinking sheets, old blankets that have never been washed in a decade, and worn, frayed towels with brand new stuff for airbnb guests. If the host wants to use all this gross stuff for himself, I could care less, but guests want fresh cotton linens, new blankets and plush nice towels, and it wouldn't hurt to color-coordinate everything. Go to Bed Bath and Beyond with a ton of 20% coupons and purchase everything you need. As for the bed in the bedroom, the mattress was so soft that it folded in around you and provided no support whatsoever for my body. I couldn't get comfortable to save my life. The host needs to buy a new mattress for the bedroom.
In the bathroom, another guest's hair was on the floor (I can't stand this) and the exterior of the toilet pedestal needs to be cleaned. Yuck!
There is no way that anyone could cook in the kitchen. There wasn't any usable pots or pans, and there was hardly any dishes or cutlery. The host needs to completely restock the kitchen with necessities so guests can actually use the kitchen to cook in or just eat food they brought.
I'm furious that I paid $117 a night for four nights at this listing and a $64 parking ticket. If the host kept everything the same, made sure the listing address was correct and was just upfront about no security, the busy major street with street cleaning and priced this at $45-$50 a night, I could see some value. If he made all the above changes, I could see value at $75-$80 a night. However, due to the total lack of security, I would never stay here because it is not worth losing your life or your stuff to stay somewhere cheap.