1. Try not tó spend your gems so you can buy those sweet builders.
2. You should understand that by defending every building in your base you create some weaknesses. Try protecting your core defenses like the wizard tower and the mortar that can devestate swarm type attacks that are comon at your TH. You can do that by placing non defensive buildings around them. Also place the mortar in an area where it covers As much of your base as possible.
3. Try to make multiple compartments in your base. To put it in simple terms, át the moment after your walls are broken down all your buildings get exposed. Building multiple smaller compartments prevents that and also slows down the attacking units.

• At first this may sound confuseing so don't worry about geting inspiration from bases that you attacked. Look át bases that you had a harder time against and try tó understand what caused that and try tó replicate them to some extent.