It was stupid that Gliscor went down so easy, but remember, it has 4x weakness to ice pokemon. Anyway we know that Gliscor will battle in the last Gym too and there it will probaly do better. I think the writers didn't use Pikachu, becase they wanted to give other pokemon screentime.
But it was stupid that that tree of Candises pokemon were so weak and only one was strong. Does she train only Abomasnow?
TO THE STAFF
I found an error in my username, the letter w.
Could I please change my name to Shiny Pokemon Lover? P.S I replase this text with a thank you line to the staff member who does it.