You don't really need ten energy in your deck. Get rid of 3 and then replace one with a special fighting energy.
4 Riolu isn't necessary. Most decks will usually only run 2 copies. You should do two because you have way too much Pokemon.
You need to get rid of two or three gabites and replace them with rare candies. If you take out 2 or 3 then use a full set of rare candies.
Lose the Hau and the Sophocles and replace them with N and Tate and Liza.
You don't need any Bridgette, especially since you have nest balls and the 2 Alolan vulpix.
Lose at least 1 pal pad and replace the other one with 2 or 3 VS Seekers. Most Garchomp decks will usually have at least 1 Tapu-Lele GX to get the Cynthia's, if not 2. Lose 1 or 2 of the Alolan vulpix for the Tapu-Lele's.
Use at least 1 float stone to go with the escape board. Keep the escape rope or switch it for a Guzma. You could also use 1 of each.
Try try again. Never ever quit.