What’s more important in determining healthy romantic relationships and a fulfilling sex life: happy childhood or a romantically satisfying adolescence?

I keep getting the message that a fulfilling sex life and successful relationships boil down to parental figures, not siblings, not peers and certainly not adolescence. I do not agree! Even the most deep thinking and original psychoanalytic/psychotherapeutic theorists such as Esther Perel and Patrick Teahan affirm that its parental relationships that matter-bullied by a sibling? Thats a parental issue. Bullied by peers when peer acceptance matters most? Boils down to the parents. Made to feel unattractive with the opposite sex/sex attractant when it matters most and forever be tormented by unrequited love? If you’re a boy it’s your mothers fault, if a girl, your Dads. I dont agree it all boils down to parents. What if you had happy childhood but an unhappy adolescence because you were a pimply teenager or less than attractive girl? I believe adolescence matters just as much in relationships if not more so, than healthy attachment to parental figures in childhood, especially when it comes to romance and sexuality. What do you think?