First point; briefly, if you or someone else has been doing a good job and the club now don’t recognise that then I’d try and negotiate a continuation for that person or accept that sometimes a new broom comes with new management, says thanks and walk away. Sounds a shame to do that but sometimes that’s for the best. Second, I’m guessing you’re saying that the right person knows what the issues are, but things aren’t changing and won’t change. If that’s the case, we won’t solve that one here, that one’s down to negotiations outside of an internet forum.
By the way, if you’re the one referred to in the first paragraph, sounds like you’ve had a rough time of it, we all like to be appreciated even if we don’t need it.