Thanks for playing my game and checking out the page. I'm sorry you feel this way. These type of games are more like short films on YouTube, I don't know if you like that genre. Sadly, I don't have enough time to dedicate months for game development and I am a solo dev doing this just for fun. But, again, your criticism is 100% valid.
SPOILER ALERT - The subway station is meant to be a metaphor for purgatory or the passing space between life and heaven/hell. The characters only remember the final stages, when the actual accident happened (which is mentioned in the end). As for the Passenger 6, the main character is the one we are experiencing the purgatory through - if you pay attention to the last bit when it says - the person was added to the list and then removed - that's because Passenger 6 is stuck in the purgatory, hence why he appears and disappears, while the rest remain.
Again, big apologies if you didn't like the game. Fortunately for me, I was able to share my simple creating to others and make their day, so that counts into something.
Best to you and I hope next time I can make something worth your time, although I do suggest playing longer horror games, if you don't like short, bit-sized horror (which is the description for this game, I am not false advertising, just wanted to underline the fact).