This style of concern trolling drives me up the fucking wall, given what we know about abuse statistics.
Step-fathers and live-in boyfriends are several times more likely to commit sexual or physical abuse on the mother's children than biological fathers. [1][2]
If biodad is actually abusing the children, then yes, by all means, get out.
But if you're leaving a non-abusive dad in order to "find yourself", or because you're "just not happy", you are, statistically speaking, endangering your children, unless you accept a lifetime vow of celibacy.
[1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2845296/ [2] https://journals.sagepub.com/doi/10.1177/1077559501006004001