Were Yoda and Obi-Wan not ‘broken’ by events earlier in their lives? It would seem Luke is too in TLJ, and understandable given the circumstances - not forgetting his path to a change of heart towards the end of the film - sacrificing himself to do so.
For me, I like it more after I left the cinema. The more I think about it - and I am, weeks after it’s release - the more I’m understanding it and appreciating it.
(That’s not to omit the parts I personally thought didn’t quite work - yet I never went in expecting a perfect film - I’ve never seen one yet. Well, there was that one short film on pornhub…)
I don’t think the Luke and Obi-Wan/Yoda scenario really are comparable. For one Obi-Wan and Yoda didn’t do anything bad to Anakin, like considering to kill him before Anakin went all psycho. Secondly, Obi-Wan and Yoda didn’t just hide under a rock on their own accord, waiting to die. They were forced into hiding by a Jedi purge in a galaxy controlled by the Empire. They also actively tried to improve the situation by going after Sidious and his new apprentice. When that failed, they hid the twins, and bided their time, until the twins grew into adulthood and the Rebel Alliance had a fighting chance.
And despite the above, they remain characters still ‘broken’ by the events earlier in their lives - in the context of a reply to ‘while there is a place for gritty and broken heroes in cinema (John Wick, John McClane, etc.), doing it to existing heroes is a step too far for me’.
I wouldn’t say Obi-Wan and Yoda were broken in the same sense as Luke to be honest. Both characters still firmly stood for previously held values.