The miniquest was probably voted against because people feared Comp Reqs. In any case, there are ways to do world events so that players don't completely hate them. World Event 2 and the Falador Events, while not really popular or enjoyable - had high participation rates because they were 99% AFK and had good experience rewards. Whereas the Halloween event is not.
Honestly, I'm wondering if its not the grind but the daily cap that's the issue as well with those. All three events averaged out to about 30 minutes a day, but the Halloween event you can do that 7-8 hours all at once, so people may be looking at it as a worse grind than the other two.
- Sorator likes this