To give a tool a fair chance I think it has to be used daily to really grok the pleasure / pain. We were aware of some of the problems, but perhaps overly confident about managing them, and underestimated the frustration and lack of agency. Possibly we let it embed too far before we decided we have tried as hard as could be expected. Around 6 months in, once a number of us formally proposed that it be reverted, we took the bold decision that we should persevere no further. Having worked in C codebases in the past - I can imagine it is almost a miraculous improvement there.