Fact #2: You're literally falling into the bottom, which is causing all kinds of issues (including rounding into flexion and going way too deep) and needs to stop. Do this: find a spot on the bottom of the wall in front of you to stare at, and do not take your eyes off that spot during your entire set. When you take your big breath in, squeeze your abs hard. Really freakin hard. Descend
under control until you are an inch below parallel, then drive your hips up to initiate the upwards part of the squat. This depth will feel above parallel to you at first. If you don't have someone competent there to yell depth feedback at you between reps, film all your sets and watch in between. You need to learn where just below parallel is.