self-critical
adjective
                                                                                                                            
                                                            self-crit·i·cal
                    
                                                                                                              
                                                                                                                                  ˌself-ˈkri-ti-kəl  
                                                      
                                                          
            
                                
              
          
                                                      : inclined to find fault with oneself : critical of oneself                                      
              
                             
a self-critical perfectionist
                                       … helping patients identify and challenge pessimistic or self-critical thoughts that cause or perpetuate depression.— Mary A. Whooley
Mary A. Whooley
                         
                
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  Merriam-Webster unabridged




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