How would you react to your child cutting you out of their life and revealing that they've been secretly resenting against you for 10+ years?

And it was because you sent them to a psychiatric hospital as a teen on a misdiagnosis and as a result they've had a completely dysfunctional relationship with their mental help and since then the PTSD from the experience has been so bad that they were bed ridden some days.
How would you react to your child cutting you out of their life and revealing that they've been secretly resenting against you for 10+ years?
Post Opinion