The broken thing is that there is a higher chance of NA tribal natives surviving compared to more advanced meso/south American native societies.
I agree that natives should have a chance to survive e.g. if the French got hegemony over North America, they were sending way less settlers than the British, so a situation like Congo and Portugal could arise.
However, what need to be taken into account that the "historically" frustrating thing is seeing some random tribe like Joara becoming gp, while this never happens for Aztecs or Incas, who were in better positions in terms of ability to exercise state power, just because their catch up mechanics are much harder for the ai to go through.
Also, the sheer amount of tags present there makes you have one imperialist war after another, rather than a settler colonial conflict, with frequent coalitions, which make the whole thing just annoying rather than engaging. Tribal land does not interact at all well with this, since you can annex it as a coloniser, creating dev, hence population out of nothing.
Also, treaty of tortillas is just badly designed, since the ai never violates it, usual colonisers sometimes cannot reach na fast enough, since carribean gets blocked of. If it excluded the carribean, it would be much better tbh.
