Parts of the red line run horribly slow due to signaling issues (no idea when that is being fixed). Those same parts are shut down on weekends and after 9pm (something like that, I don't know the exact time) and replaced with shuttles.
The green line extension has been great when it worked but its been a mess.
Taking the green line and being stranded in a tunnel with no updates. Eventually multiple if us just got off and took Lyfts to where we were going.
The new trains had multiple issues. The Fires and I am sure plenty of other things I am forgetting about.
I made a conscious choice to not own a car but I am finding myself spending more and more on taking Lyfts because it just isn't reliable. Then traffic gets worse and it is just a really bad situation.