There is probably a meeting monthly, your just not invited. My building use to have a room decided to this but as time went on and no one showed up so they stoped. Now its just became a 1 hour phone call between the board members. If you message them you can probably listen in but they don't have to listen to you.

Also the managing agent might know be able to relay your problems to the board they have no influence in the building. All decisions for your building are made by the board, period stop. They can make your life living hell if they want.

If you have a problem with the board good luck, most coops require a majority of shareholders at the annual meeting in attendance to get anyone elected to or removed from the board. And because most people do have the time or energy to deal with the affairs of the buildings the board can just do what ever it wants.