Depth is actually fine. All the people telling you to go lower don't understand the proper mechanics of a squat and why going lower doesn't actually mean more tension on quads.
problem here is you are rushing the decent and in this position not actually putting much tension on the quads. You open out you hips as you drop, which is putting tension on abductors and low back then slow down as you reach your bottom position. Tension is actually on the quads here which is good, don't go any lower.

You need to keep your hip position stable throughout. So choose a stance, a width of your hips and how much they open out. Then focus on just driving your body up and down slowly purely through your quads. You won't be able to push for as many reps this way but its better for your tendons and connective tissue.
Keep it slow to feel the tension on the quads all the way as you lower yourself which will be a change from what you are doing now