Is it child neglect to not buy your child food because they have a job?
Did that anon read the books? The whole point was Dumbledore leaving Harry with the Dursleys because of Lily's magic protection. Dumbledore knew the Dursleys were abusive, and instead of putting Harry's wellbeing first and implementing secondary protection (and that would have been easy enough with a secret keeper) he decided to "see what would happen" to his little hero. "For the greater good." Everyone has every reason to dislike Dumbledore for that reason.