Oliver rejects Emiko's excuse that their father's neglect is the cause of all of her actions, pointing out that everyone is responsible for their own actions.
Hunter Zolomon/Zoom falls into this. He had Abusive Parents, including watching his father kill his mother, leading to him being put into an orphanage at a young age. Zoom is convinced that Barry, who had a similar past of having his mother killed when he was a kid, could easily turn out like him. He tries to prove it by murdering Barry's father in front of him. However, despite this traumatic event, Barry still remains righteous and never succumbs to becoming the sociopath that Zoom is. Ultimately Barry shows that Zoom is rotten to the core, Freudian Excuse or not.
Season 2 has Eobard Thawne finally admitting why he became evil; he admired the Flash and wanted to be his successor, but found out through time travel that he was destined to be the Reverse-Flash. This, he decided to embrace this destiny because of his ruined dream. Barry doesn’t have an ounce of pity for Thawne.
In an earlier episode, Barry and Iris find Captain Cold in their house, who warns Barry that the Weather Wizard and the Trickster are after him. When Iris asks what he's doing there, this exchange happens:
Barry himself falls into this at the end of Season 2 and beginning of Season 3 when he is so distraught over his father's death that he goes back in time and saves his mother, something he almost did in the Season 1 finale, and creates a very different timeline. When things start to go wrong, he lets his mother get killed in the past again, only to find that the seemingly restored timeline isn't quite the same. He tries to change it again, only to be stopped by Jay Garrick, who tells him that attempting to do so will only make things worse, and he shouldn't abuse his powers just because of his traumatic past.
In Season 5, it’s revealed that Nora accepted Eobard Thawne as her mentor and assisted him for a chance to meet the dad she never knew. Both said father, Barry, and Sheroque Wells say that her past doesn’t justify working with such a dangerous supervillain, let alone one that killed her grandmother.
Season 5 also has Barry banishing Nora to the future after it's revealed she was working with Thawne, without consulting anyone, not even Iris. Although the team understands that Barry is still in pain over his childhood, and acknowledges that Nora was still working with Thawne despite knowing full well who he was, they refuse to defend this act. By the end of Snow Pack, even Barry himself admits he went too far.
Season 6 has, of all things, the Speed Force falling under this. The Speed Force has been aloof and obtuse towards Barry and not caring about his personal wants and needs in the face of The Needs of the Many, despite the effect it has on Barry's mental state, and punishing him ruthlessly for any misuse of his powers. When it makes the mistake of telling him that Ramsey Rosso can help him prevent the coming Crisis and survive, he lashes out against the Speed Force over everything it has ever done to him, including becoming the Flash and forced to endure many tragedies in his life just to be molded into the Speed Force's champion.
In Season 5, while Kara acknowledges that she made a mistake in not telling the truth about her secret identity to Lena, she points out that Lena has used that as her excuse for every one of her attempts to spite or hurt Kara. She then says that Lena will have to take responsibility for her own decisions from now on, including working with Lex and trying to brainwash the world.
