(First time watching Star Trek) Troi's character feels like wasted potential

Hey! Me and my boyfriend have been watching the Berman era of Star Trek for the first time, it has a lot of good episodes (so far!).
One of the impressions I've gotten though is that Troi's character feels pretty useless. Or maybe useless is the wrong word --- wasted potential maybe? Idk.
And it feels like the second Guinan was introduced----well, it seems like she did more counselling than Troi herself did.
I'll reserve any final judgements until we're done with the series though

Anyways, it's certainly an interesting experience watching this show! My boyfriend's favorite series is Voyager and mine is DS9!