PSA: Riot is a company.
The reason why they might do some questionable things like buff champions no one really needed buffs, or remove certain game modes from some region is because they are a company . They want to earn money. By buffing champions that see lower play rates, (but don't have problems with their kits) makes people more inclined to buy them, and potentially buy skins for them. They also don't maintain certain game modes on some regions because the amount of money they would earn from that region would not outweigh the amount it costs to maintain that game mode.
Yes, it isn't right to manipulate parts of a game to earn money, but then again they are a private, profit-gaining company.
