Reform the United Nations? No! One can't reform what is inherently destructive. Many UN members are dictatorial regimes; they deny basic rights to their citizens. Some of these evil dictatorships, such as Iran and Syria, sponsor terrorism.
To allow dictatorships to vote on UN policy is to legitimize them and sanction their evil, which only serves to bolster them. Their primary aim is to hold onto their power at all costs. Because the goals of dictatorships are opposite to those of free, peace-loving countries, the UN policy of negotiation and compromise with tyrannical regimes merely advances their goals. As novelist-philosopher Ayn Rand wrote: "In any compromise between good and evil, it is only evil that can profit."
The best way to end a dictatorship, apart from military action, is to shun and isolate it, letting it self-destruct. The best way to reform the United Nations is to dissolve it.