Science Fiction with multiple unique civilizations with unique power systems is my favourite.
The ending is bullshit and cliche. I thought the MC would die and his relatives will be fucked. But due to plot armor it did not happen.
The so-called new world of MC is also just 0-dimensional fiction but the MC thinks that he is a 4-th dimensional being with time element. But he is stupid. He has just entered another zero dimensional fiction under fiction universe. Any DC or Marvel reader knows this.