Reviving the thread with a bit of a Hot Take.
I finally got to watch the movie, I loved Cars as a kid and I actually didn't mind Cars 2 (though it really should've been a spin-off instead a sequel), I missed my chance to watch Cars 3 and never got into trying to see it until tonight.
However, I couldn't finish it, I stopped after the failed training session. I loved the very opening bit with call back to Cars 1 and neat little interactions, it really tried to set up as the actual Cars 2, but when the story actually got started, it lost me really fast.
I understood the principle of the movie about aging, moving away for the younger generation and of course in the Motorsport sense, advances in technology that make older race cars fast at one era be obsolete in the other (look at Super GT500s history and you see some massive jumps) but I thought it was boring. It was getting this principle slow and drawn out constantly punching down on Lightning with no chance to get back up, didn't really find a character to enjoy yet to encourage me to keep going either, which is usually the element thatll keep me coming back to something even if I hated it.
Not to say I'm against movies with the point that the Main Character couldn't achieve his goal and had to settle for something else, Monsters University has that and I thought that was well done, difference is in MU, Mike is still constantly trying to fight up and actually gets to succeed in moments and even was able to prove them all wrong at the final competition only for the rug to be pulled and realise Sully cheated for him to win which actually still proved them right, the message comes in quick to let you feel the weight of it and the characters. Cars 3 with Lightning feels like the same bandage but this time the bandage is pulled at a much slower rate and weight has already been felt and lost 30 minutes ago
I can't necessarily pick on Cars 2 anymore, as at least I was able to finish that one