@Hans
Welcome to the heartbreak of development. You climb a huge hill, deal with numerous technical challenges and hurdles, work late (often for days on end) and finally deliver something great.
The users say "Thanks"........ and immediately ask "Now can we have more" (!!).
You can never do enough. The only ones that truly understand and appreciate what you have accomplished are other developers. The rest have no idea. You just have to learn to deal with it, or take up farming...