Some problems with the history of the Transitway include:
The big lie at it's creation: Haydon and others promised that it was being designed for conversion to rail once Ottawa grew to a city of a million (he admitted this was a lie when he came out of retirement to run for mayor of the 900K+ City of Ottawa as a single-issue candidate against conversion).
Over-capitalizing and over-engineering the system (especially the Southeast Transitway, which we are now orphaning) was tied into this.
That we built an innovative system (I admit that it was) and then refused to adopt any new operational innovations that followed in places like Bogota and Curitiba and others, that would have kept it performing better up to present day. The O-Train had those pay and display parking meters selling tickets at every station, why not the Transitway? Because reasons. Honour system fare paid zones in every station for transaction-free boarding. Buses with larger doors, always opening at every stop (instead: ability to skip stations is touted as a feature, and anyone who has used undersubscribed stations like Train and Pleasant Park has watched in-service buses fly by them without stopping). Cool "software-based guidance systems" (as opposed to guided transport, like rails) like they have on the TEOR in Rouen (sorry, French only:
https://fr.wikipedia.org/wiki/Transport_est-ouest_rouennais#Guidage_optique) that might make for smoother rides. High-floor platforms before they had low floor buses. Open access to the GPS data took forever. Next bus arrival displays that you find in so many other systems. the list goes on and on.
The terrible job the planners did at spacing stations, situating stations, integrating stations into communities, etc. See for example, the huge gaps between stations in some areas (on the West Side, not just past Dominion, but also between Tunney's and Westboro),coupled with ridiculously close stations like Dominion and all along the Southeast Transitway. How lengthy stations like Tunney's Pasture only have one entrance at one far end of the platforms. How stations like Heron, Billings Bridge and Bayview were designed to thwart walk up traffic to the greatest extent possible without resorting to landmines and electric razorwire fencing. How the Transitway suddenly turned into a local bus route stopping 8 times in the 2.5 kilometres from Lebreton and Laurier (stop at Good Companions, stop again at Bay, Stop again at Lyon/Kent, skip a bit all the way to O'Connor, stop again at Metcalfe and MacKing, and finally Laurier; so now we're over-correcting with too few stations between Lebreton and uOttawa). We can go on.