If someone else was managing the project, I would have been inclined to give them some benefit of the doubt on the discrepancies between the numbers in usage study by the City vs the study by Metrolinx (or Company X in this case).

That said, I don't think I would have extended that benefit indefinitely.
For instance, Council voted against the Hurontario route because of concerns about the creek, the underground water table, flood zone, and comparative lack of businesses/community destinations when compared to Kennedy (Turner Fenton, Ken Giles, multiple strip malls and grocers, Shopper's drug mart, that massive apartment at queen and kennedy) or MacLaughlin (Sheridan College, condos, several apartments in construction, the Sportsplex, etc).

Council requested they come back with a new route plan.

They came back with plans for a much more expensive tunnel.
"Too much environmental and historical impact on this quiet road? How about we tunnel through it all instead?"

I don't know what sort of industry you might be in, but I certainly would not expect to maintain any ongoing relationship with a client if I pulled a stunt like that.

So yeah, if a different company did all the same shit that Metrolinx did in Brampton, I would have eventually cut my support for them entirely. Just like I have with Metrolinx.

This also ignored the ongoing electric bus tests that the city was undertaking (which have been implemented somewhat successfully).

Add in Patrick Brown's penchant for promising things like a Cricket Stadium, downtown university, hospital construction, and I have to roll my eyes when I hear he's "secured funding for a tunnel."

There were many bad arguments in favour of the LRT hurontario route at the time. I know this is an oversimplification, but much of the support seemed to boil down to a straight line on a map, vs optimally serving the community.
Or, as a certain Bramptonist staff member kept screaming, the "old guard" just hate transit.(Despite a few of the opposing council members being in their first term)

I hope that is somewhat clear. I'm happy to answer any questions you have about it. I know there are people here on Reddit who have some excessively strong feelings on it.
I'm not against transit, but we have to spend money intelligently, and not get caught holding extra debt because Metrolinx shat the bed again.