I will say that fast-tracking is pretty much the only way to negotiate a treaty
That's an incredibly black and white opinion. That's basically supporting top-down corporate communism instead of a democratic process.
A democratic process may be messy, lengthy and do horrible things like offer some semblance of transparency, some safety/environmental concerns and possible fairness towards workers and consumers ... but it's not an impossible process.
The corporatists want you to believe the lie that a democratic process can't work and spend a lot of effort manufacturing consent among the populace to reinforce that lie. Looks like they got to you.
Hustling through a treaty that benefits the rich while fucking over everyone else for the sake of hustling through a treaty isn't the way things "have to be". That's just a corporatist talking point to keep the megalomania sickness alive and well.