Happs, you have just identified the intractable problem with all HOA boards. You don’t have the time to serve on the HOA, even though you would be a valuable asset on the board.
But it is an unpaid, thankless job, and you would take slings and arrows from often ignorant and angry homeowners. So naturally the board attracts people with time on their hands who may or may not be reasonable. And naturally, they develop a bunker mentality–you call it cliquish–after taking criticism for a while. Keep up your reasonable-sounding campaign, do your research, and prove your case if the numbers are on your side. They cannot postpone and ignore you forever. As a last resort, detailed flyers on every door in the complex may be necessary.