It's absolutely shameful of you to call the developer lazy or say they need to "do better", no matter when the last update was.
This is basically a free game and you are not entitled to frequent updates and content, regardless of how much you donated or for how long you've been a follower.
The developer will release updates based on their own schedule and you have no place to set expectations for the development or even implore the community to stop donations. This is their game after all, not yours.
Perhaps rather be grateful for the fact that you already got to enjoy all the updates that have come out so far.