Sadly many non-believers have absent or raging fathers. The father is supposed to be a parable of the Heavenly Father. So if they have an absent or raging father, they think that’s how the Heavenly Father is & are turned off by the Heavenly Father. But Jesus says the Heavenly Father has adopted us. It doesn’t matter your heritage, you’re welcome into his family as his children & placed as a co-heir with Christ.
Raging fathers are sooo fun!
I think it's a lot easier said than done to be a good father. Many factors will affect our chance of becoming a good or bad parent, not just our faith, willpower, motivation.
It will also be strongly affected by our upbringing, environment, financial situation, and even our genes.
Everybody breaks down in the most trying circumstances. This is why people by nature, by instinct tries to avoid these situations. In our world, that typically means achieving financial stability/independence, moving to a place that allows such opportunity and is also safe, peaceful, and low stress.
But even these things cannot guarantee low-stress life. You can still be plagued by behavioral issues that can be genetic or deal with bad neighbors, deal with bad relationships or even even contend with an unruly child.
Bad leaders will convince you that when things go wrong, it's probably your fault. But we know in countries that work. Low crime rates, free healthcare, free education, high standard of living for everyone (not for just a few people), leaders take accountability and work with people, instead of blaming everybody else but themselves to keep people deceived and corrupt people in power.
One of the reasons I don't want to have a child of my own is I would likely become a bad father given my background, past traumas, unpredictable behavior, unpredictable abilities, etc. Things I won't take chances against.