He tried, but he kinda failed and never went out of his way to make up for it despite having multiple opportunities. Not a bad person, just a bad father.

He is not great

In cultural context, worf was a probably a progressive dad. But his kid was even more human than he.

He's not entirely terrible in the episodes where his son appears. But Worf has been in around a dozen seasons of Star Trek (TNG, DS9, TNG Movies), and his son has been in like 3 episodes.

There's reasonable TV production reasons for this, but it's one of those oversights that feels really glaring on a second watch through.

So mathematically, Worf is the worst absent father imaginable.

At one point, Worf dumps Alexander with Worf’s adopted human parents because he feels like he can’t take care of Alexander (with the stimulus being his struggle to handle his son’s misbehavior at school), and Alexander has a really difficult time.