There actually are problems with all of the trade agreements that currently exist. The reason you don't have anything in front of you is that indigenous peoples haven't had the funding to challenge them directly. The international and domestic processes are exceptionally expensive. It's one of the reasons the United Nations is recommending an international treaty to govern transnational corporations, because current countries such as Canada don't make any accommodation, take accountability or responsibility for the crimes that transnational corporations such as the Hudbay Minerals mining company, for example, commit not just in Canada but around the world.
If you look at the balance of protections, the vast majority of protections under the TPP go to the investors. The wording of the TPP is very specific and could be detrimental. The Waitangi Tribunal has already looked at this issue, for example. The question was whether or not the TPP violated their own constitution. They said it didn't, because it had a treaty protection clause for the Treaty of Waitangi. They said that even though that's the case, there are far too many protections for the investors and the wording, and that the interpretation is detrimental to the states themselves, let alone the indigenous peoples within them, because of what's considered a favour.