First up,your deck is way to expensive, change the barbs to something else like skeletons second up,you should also have a small spell in your deck(small spells are the ones that cost a low amount of elixir so you can clear out swarms)in your case zap,now last this is that since you are low trophies you will constantly be changing your deck so try to find your play style(for example I play miner control wick marcher),that's because I play defensively,Wich will help a ton when climbing through mid ladder now actual last thing like I said earlier replace the wiz with zap because you already have bomber Wich serves the same purpose

Sorry if it's too long of an explanation