Maybe it's just me, but the power and ground wires to your fuse block look a bit small to be providing power to things like the fridge and air compressor simultaneously. Depending on the type (LED or incandescent) the lights may also be an issue as well as whatever amp loads are plugged into the cig lighters.
Think of those wires that provide power and ground to the fuse block like a water pipe. If the water source is small, when demand becomes high, not very much water will flow to the demand.
If the compressor is a 20 amp load, and the fridge is a 5 amp load, and your feed wires can only deliver 20 amps efficiently, both devices will suffer, your feed wire will be come overloaded and possibly fail. A good reason to make sure there is a fuse or breaker on the positive wire that feeds the fuse block at the battery that matches the rating of the fuse block. Blue Sea rates the max amp load of that fuse block at 75 amps, but you have to make sure your wiring to the fuse block can handle the load and not become a fuse themselves.
Not a critique, per se, just a tip from someone who would hate to read about your rig fire.