A few countries had an outsized role in deciding these terms like much of the other WTOs rules...through the use of pressure, coercion, and other carrot/stick approaches.

If it's not voluntary, I don't consider it global consensus.

Joseph Stiglitz makes a similar point...

"TRIPs imposed on the entire world the dominant intellectual property regime in the United States and Europe, as it is today. I believe that the way that intellectual property regime has evolved is not good for the United States and the EU; but even more, I believe it is not in the interest of the developing countries."

You're being deceitful here. Stigler does oppose TRIPS because of its effect on developing countries--because intellectual property protection keeps developing countries from using patented things. In other words, he wants patents to be less restrictive, not, as you're falsely implying, more restrictive.