I don't have the energy to do more than a few sets of squats,

Sleep more + eat more + stop complaining

I've tried doing front squats or deadlifts after my back squats, but it feels impossible, my form is atrocious and I just get burnt out for a few days after.

I never had this issue when I was lifting at the gym and just used the leg press and leg extension/leg curls. A few sets of hard squats seems to destroy my life-force

Squat heavier? That's not really a problem.
There's always RDL,s paused squats, 1 1/2 squats.

Also

https://www.youtube.com/watch?v=xu00M7sIVCc

>>40104613
Front squats and lunges would work. You could also do isolating exercises like Bulgarian split squats.

>>40104624
I'm already fat, so eating more is not a good option.

Sleeping more is impossible, I already sleep for 8-10 hours a night, more so 9+.

>>40104644
Then the only remaining option is to stop complaining like a pussy and start squatting like a man.

>>40104667

>>40104613
You don't really need to increase daily volume. By increasing frequency by squatting more often during the week you increase volume that way.

>>40104613
Quit being a bitch. You will never accomplish anything looking for shortcuts.

>>40104644
Do cardio and increase your work capacity to lift heavy. Lose some weight too fatty.

>>40104613
3x5 followed by 5x10