I don't see Lwaxana Troi as a "good" mother.
"Good" parents don't ignore and trivialise their adult children's opinions and choices. They don't attempt to manipulate (and bully) their children into what the parent feels is the "right" choice (especially over relationships). They don't turn up at the child's workplace, insult the child's managers and interfere with the work the child is doing.
Lwaxana Troi's background might explain why she does this, and I don't think that she doesn't want to be a "good" mother but good intentions aren't the same as good parenting. Parents want to be good parents and it's hard to imagine anyone who deliberately sets out to be a "bad" parent nevertheless there are bad parents out there.
If intentions are the thing that makes someone a "good" parent then it's hard to see why Worf gets such a bad rap.
Lwaxana did her best and that must be chalked up as a point in her favour. "Good enough" yes: "Good" no.
Yes, because I was totally serious and not being sarcastic at all.
