Its personal trainers like you that have ruined the industry.
Its clear that 9/10 experts would say you are teaching shitty form, but instead of taking the time to learn what good form might be, you instead look for reasons why your shitty form might be ok. Sure not everyone preaches or demonstrates great form, even authors on here can not agree on some of this stuff, but your clients are clearly demonstrating poor form.
I myself am not an expert on squatting, and thus I dont try to teach it.
The squats were not horrible, but they had no business with that amount of weight and going as deep as they were with that form. They should be learning with a broom or the bar at most.
The deadlifts on the other hand, were absolutely horrible. The deadlift is also one of the easiest lifts to learn, as long as you dont try to go to heavy too soon.
The pullups weren’t that bad, especially for average girls doing them. I wouldn’t worry about them too much, since there’s obvious areas that need attention.
Your deadlift was pretty crappy form, and I dont think EC’s was too great either, but hey both of you were maxing. If however your form looks that way on submaximal work, then youve got problems.
My advice to you is to listen to what people are saying, and learn how to PROPERLY teach these movements. Your mistakes have been pointed out by those that know what they are doing, and when one or many of your clients gets injured, you are going to be at fault. I know its hard to post something on here, and then get attacked for it. Happens to me all the time, but your best bet is to learn from others.
My suggestion on the deadlifts and squats:
Deadlifts should be performed as partials for most trainees in the begginning. Use a power rack, and have them do rack pulls, with light weights. Instead of progressing them up in weight, lower the pins for progression, until they are ready to deadlift from the floor.
For Squats, DB goblet squats are a great way to learn the correct form, and develop the flexibility/mobility to perform them. Also, check out the Squat RX videos, just make sure none of your clients see them, you might be out of business j/k.
Lastly, if you have a bachelor’s degree, why not get a CSCS certification. That would be a great way for you to learn what is proper and what is garbage.