Who has it worse? The one with no siblings, or the one with BAD SIBLINGS?
My guess would be the one with bad siblings With a constant negative influence around you, one can end up having little trust in others or other psychological issues. Siblings can often be substituted with GOOD cousins or friends for only children.
Many become depressed for many years due to a bad sibling who bullied them and hurt them emotionally. Even parents can't protect you all the time from bad siblings. Having no siblings is definitely better than having bad siblings. Abuse can come from siblings too, not just parents. What do you think?