LeandroAnjos

I think there are two main protagonists, Deok Sun and Sun Woo, Taek is simply FL's love interest and not a main character, Jung Hwan elevated himself to main character status during story development, but the writers failed to realize this or they didn't have good ideas for his rejection arc by Deok Sun, so his absence in the last two episodes is weird and revokes his ML status.

That's why I love this show, and it's the same reason I don't like the last two episodes, the character of Jung Hwan raised hinself to main protagonist status, Jung dealing with rejection deserved closure as much as the story arcs of Deok Sun and Sun Woo.

The neighborhood being annoying is questionable, I kind of agreed, but even though they are annoying they still a interesting bunch, it's at least a colorful cast of characters, the other two points you nailed it, mainly the ML past, I love kdrama, but sometimes the screenwriters plan a roller coaster of emotions that the ML has to go through in order for his character to grow, but they often opt for easy exits within the script instead of working the narrative in order to justify these emotional catharsis, all this outrage over such loose justifications cheapness the whole experience.