The evidence for slow operations being mostly the responsibility of the TTC is all on Urban Toronto. If you don't have the time to find it, here are some examples: "The transcripts and youtube video of the TTC Board meeting from December 10".
youtube.com/watch?v=-5Xz9HS6ank
"This more aggressive form that is proposed now... this is a new change." The notion that having some effective TSP versus borderline non-existent TSP was never considered before, while scapegoating the other stakeholders is infuriating to many onlookers. Yes, Metrolinx shares responsibility, because they could have overrode the dumb ideas with better ones) years ago. I also want to point out that the original contract definitely specified something between 33-38 minute trip times, not the currently scheduled 46.
Here's something City Transportation Services sent to City Council in April, which I have cited multiple times since then.
"Regarding the use of TSP on the new Light Rapid Transit (LRT) lines in the City,Transportation Services and Transit Expansion Office staff have worked very closely over the years with both Metrolinx and their consortia building the new transit lines to ensure that the City's policies and practices that support TSP are incorporated as requirements within their projects. [...] For these reasons, and in consultation with the City and TTC the Metrolinx consortia are implementing Conditional TSP on Line 5 Eglinton and Line 6 Finch West."
This is TSP that might as well not exist. Which calls into question exactly what those policies and practices are, and what use, if any, that those consultations with the City and TTC had. Make no mistake about it, all the evidence points towards City transportation services and TTC were 100% ok with the line being opened in its current sorry state. One can assume maybe City council and the TTC Board were kept in the dark about this.
You also have to read in between the lines. The general sentiment on Urban Toronto is that TTC staff are basically saying we tried nothing and we're all out of ideas. "TTC staff: during the contact and Metrolinx managing the contract there wasn't really the opportunity for us to intervene."
"wasn't really" = at best means: we could have said something, but we chose not to, because we're ok with conditional aka useless TSP. At worst, they were fully complicit as can be understood based on that April city report I cited.
The TTC staff never outright say that they are contractually obliged to renegotiate a contract if they're just operating Line 6 to speeds dictated in the original contract. They just say they "need to consult" or "done in consideration". Need to consult is not the same as "contractually obliged". The original contract would've accounted for the maintenance needed for a 33-38 minute trip time. We're paying an exorbitant ~$1 billion for 30 years of maintenance for gosh sake, the notion that maintenance costs weren't accounted for in a maintenance contract is almost ridiculous. The TTC never say they are obligated to amend the contract, in the same manner that they reveal that they are not obligated to consult with City council on removing streetcar stops.
"Myers: when the decision is made to remove a stop there's nothing actually stopping the TTC from removing it right?
TTC staff: yes but we typically consult with the local councillor and their staff. The outcome in almost all cases is do not remove our stop"