First time having manual brakes, are mine bad?

Are the shoes in the rear installed backwards? They are self energizer and if the trailing shoe is in backwards they will not clamp as good.

Back in the GTE days I had a F350 Super Duty dully Bucket truck. Drunk *** company shop mechanic put the rear drum shoes on backwards. Worked OK for flat ground but going down a twisty STEEP hill, I had a "Run Away' truck. Both feet on brake pedal and pulling on the steering wheel, E-Brake on trans tail shaft and down shifting to 1st kept me from going over the guard rail. At the T section at the bottom of the hill I blew thru the Red light and ended up in a field. Front right rotor caught fire.

The mechanic retired two weeks later, before the investigation was final.