I have been trying to get back into Sun and Moon but there is just NOTHING at all to do. I don't think I have ever been this burned out on Pokémon... the heckity games!
I had a time when I didn't play Y for a while. I just didn't know what to do other than train Pokémon. Then I found out an easy way to shiny hunt! So I caught three shinies and I now have no copy of Y.
I get easily bored with it, since the only reason I would play is shinies, which people ruin by claiming to be better because they hacked in a ton of shinies with their QR codes back when it was a thing. I usually don't even bother and play something else like Animal Crossing or binge watch YouTube until I've watched almost the entire site. Either way, I think its okay to get bored with things, because if we tried to stay motivated our entire lives we would be putting that effort towards the wrong goal.