It's important to note that the entirety of Rei's and Endeavor's trauma stems from Toyia/Dabi being deranged, even as a child.
Enki and Rei were both eugenicists who made a choice and it led to Dabi, but MHA fans are illiterate and only blame Enki.
“if it was so simple a thing, then why not sooner?” is an eerily accurate characterization of a suicidal young adult that, after being emotionally neglected as a child, is granted the attention that could’ve saved his life only *after* getting to an extreme degree of self-harm.