It could be. There are some stories based on real events that might seem like the garbage barge story, but it's hard to say for sure without more details.
I'm not sure specifically what 'garbage night graphic novel' is about as there could be many different stories with that title. It might be about events that occur during a night related to garbage, perhaps with some strange or interesting characters in a graphic novel format.
I'm not sure specifically as there could be many 'angry garbage man' stories. It might be about a garbage man who is angry because of long working hours, unfair treatment, or maybe difficult working conditions.
The term 'garbage time light novel' is quite ambiguous. It could be that the 'garbage time' refers to a time in society that is considered useless or wasteful. The light novel could then be centered around characters who are living through this 'garbage time', facing various challenges, or perhaps finding some sort of meaning or adventure within what is generally regarded as a 'bad' time.
I recommend the novel,"A Hundred Ways to Become Immortal." The male protagonist was considered a waste. He bought all kinds of waste all year round, including waste pills and low-grade materials. However, he was not picky. As long as he could be recycled, he would not let go. Through continuous acquisition and cultivation, he eventually became a top self-cultivator in the immortal world. I hope you like this fairy's recommendation. Muah ~😗