Xander is a weird character that I never feel like ever really found a good place.
He started as the kind of “oh I’m so into you Buffy” character, but I think they saw how popular Angel was an absolutely dumped the Xander romance angle as quick as possible. So then he has some fling with Willow that goes…nowhere. Then during Season 4 he's only really Anya’s sex toy and Buffy’s conscience, which bleeds a little in S5 with that weird scene where he just comes out of nowhere to tell her to go tell Riley she loves him.
I really really like a lot of the ideas with his character and I honestly feel like in a different show, he could’ve had more time to shine. The problem is that his issues are largely….quaint compared to the rest of the cast and plot material.
Like his dream in Restless is FASCINATING. He feels like he’s stuck in place, accomplishing nothing in life, like his friends are all leaving him behind. His greatest fear is something so mundane and real: that he’s going to become his father. We’ve seen hints before of Xander’s home life and know that, at the very least, it’s not ideal.
The problem is all of what I just mentioned would make for really boring television, especially when you consider that at this time Buffy was about to fight a literal god. While his conflicts and ideas are fantastic and would make a really great character arc, he’s in the wrong show for that to happen and it all shows up too late. If this was established by season 2, there’s more time to develop it. As is, over halfway through the show Xander gets an actual character and then his friends are off fighting gods, coming back to life, and fighting the literal concept of evil itself. There’s no time to stop anymore for a real problem like self hatred or feelings or inadequacy. Heck, even a concept as simple as addiction becomes a full supernatural saga by the time of Season 6, with a big villain to fight by the end.
I like Xander a lot because I think he’s the most relatable of all the Scoobies. The problem is that it makes him an Everyman and the least interesting person to watch in a show filled with witches, werewolves, and vampires.