The problem most people have in my experience is that pushing a squat pattern to failure is hard. Luckily, you don’t really need a squat pattern, a leg extension is going to hit all parts of your quad effectively. Just be sure to add in a glute and adductor movement since you won’t hit them in a squat.
I’m aware lmao. I don’t have any issue teaching failure on squat patterns, because I’ve been doing this shit forever. I’m talking about the general populous, and dude, if you don’t think most people have a more difficult time training hard on squat patterns than other exercises, you just need to talk to more people.
Discomfort and muscular failure are two different things. Discomfort is a neurological response and failure is a failure to recruit enough motor units/muscle fibers to lift the weight. Neither are difficult to achieve. You’re not fighting demons on leg days, you’re just mentally very weak