I'm pretty sure that the weighting of each map depends on who ranked on the map, and not necessarily the difficulty. This explains why you can get more PP from older maps and not as much from getting good scores on more recent unpopular maps.
The whole purpose of the performance point system was to be more contextually relevant to the game (compared to the completely farm-based score system), and not to be 100% skill-based. The fact you're #3 doesn't mean you're #3 in terms of skill, nor does it mean that the system is broken. It's just means that you are able to score #1 scores on songs more often than other people. It's working exactly as intended.
IMO, I'd think that it would be more worth it to ask for a way to block #spectator messages if it's bothering you that much.
The whole purpose of the performance point system was to be more contextually relevant to the game (compared to the completely farm-based score system), and not to be 100% skill-based. The fact you're #3 doesn't mean you're #3 in terms of skill, nor does it mean that the system is broken. It's just means that you are able to score #1 scores on songs more often than other people. It's working exactly as intended.
IMO, I'd think that it would be more worth it to ask for a way to block #spectator messages if it's bothering you that much.