Honestly I have to go with OP if I'm taking a side, as an NYC apartment dweller myself. Like yeah, you have to make compromises and get along with your neighbors etc, but this guy has just permanently annexed the hallway. It's a fire hazard and an all around dick move. Part of living with limited space is looking the other way when people fudge the rules, sure, but the other part is not taking more than your share of the common space. At the very least this guy has inconvenienced everyone else on his floor (assuming it's an elevator building) or everyone living above him (if it's a walk up)
Maybe it's my bias as a pedestrian, but cyclists can be nearly as entitled and dangerous as a motorist to people on foot. The number of times I've almost gotten run over by cyclists blowing through red lights is uncountable. And if my neighbor was like actually it's my inalienable right to block the hallways with my bikes, I would not like that one bit