Mistrust of the WTO also stems from its lack of accountability and the lack of democracy for developing countries in the Geneva based institution. In theory the WTO is democratic. Each member has one vote and decisions are meant to be taken by consensus. That's the theory. In practice developing countries are severely hampered in the negotiations which take place before the 'consensus' is reached.
Rich countries dominate decision making.
The US has over 250 negotiators while 30 of the 134 countries cannot afford to base anyone in Geneva, one of the world's most expensive cities. During the previous round of negotiations key decisions were taken behind closed doors with Third World representatives left in the coffee bar dependant on Western journalists for information. Enforcement is similarly dominated by the superpowers. There is a dispute panel which adjudicates, but it is then up to individual countries to enforce their decision by imposing trade sanctions. The US has little to fear if a small Third World country threatens sanctions, but could destroy an economy if the situation is reversed.