Assessment request and image originals: https://www.reddit.com/r/posturepals/comments/14oqf6t/i_am_at_breaking_point_i_took_some_better_photos/
We have a lot to look at on these images. Thank you. Here is my take on what I see displayed.
Feet are in a wrong position. They are fanning out at the toes and close to each other at the heels. See blue lines (out steps) converging at the back. We would want them parallel. What is interesting is your postural habit of placing the left foot ahead of the right. You do that consistently, and I can guarantee you that every time you are standing (especially when you feel comfortable standing) your left foot will be placed ahead of the right. It's your current habit, you do it subconsciously and you will find out that it happens all the time.
Because of the difference in placement of your feet, it was hard for me to place the green plumb line. But I took a wild guess and went with the right foot. It may be off, but it will still illustrate what is going on. Maybe, if placed properly, the habits shown will not be as severe, but they will still be largely present.
The blue/white markers (ankles, knees, iliacs (anterior superior iliac spine), bottom and top sternum should all be on the green line.
You are rotating your pelvis (lower torso) clockwise (shown as black object), lifting your sacrum up (green spot) and pulling your iliacs forward and down.
You are rotating your ribcage (upper torso) counter clockwise (shown as white object), pulling the sternum (yellow line) backwards at the top.
These two rotations of your upper and lower torso are bending your spine (shortening it) as shown on the red curve.
Your mechanism of your arms is shifted too much backwards.
On top of that, there is some serious twisting happening. If i'm not mistaken (happy to hear others input on this one), It looks like as if you would be rotating your left side of your torso to the left around vertical axis ultimately shifting it forward. While doing that, you are loading your front (left) foot.
There is a simple experiment you could try:
You will need 2 broom sticks (without the brush) or some other similar straight sticks about 2 m long.
You will also need to locate 2 areas on your body. First is iliacs (anterior superior iliac spine). Its bones sticking out on the front and side right under your bely and it's the blue marker at the waist height. There is two of them on on each side. Find them by feeling them out using touch of your finger tips. Its important you get the location correct. I also marked them on the anterior view and placed one of the broom sticks horizontally.
The second spot is your top sternum. Again, the blue marker at the top. That's where your second stick goes. Just like on the image.
You will use one hand for each stick. Start by holding the stick in the middle (so it balances itself), then place the first stick on your iliacs. You may need to "tuck" your stick under your belly a little. You should feel the two iliacs rubbing on the stick.
The top stick can get tricky too. With your other hand, balance the middle of the stick at your sternum and square it. If your shoulders aren't touching the stick, feel free to "roll them forward", until they touch the stick. You should have 3 points of contact - sternum in the middle and the front of your shoulder at either side.
Make sure sticks are horizontal.
Now, you are ready to do the experiment. Walk yourself close to wall, comfortably enough so the sticks don't bash into anything. If the stick move during this adjustment, that's fine. Now, you should be square to the wall. That means, that the tips of your toes must be exactly the same distance from the wall. If they aren't, please adjust them now.
If you are close to a wall, this already may feel very odd to do.
Once you checked your feet are square to the wall, you can use your peripheral vision to see if your waist is square and the same with your upper torso.
You just gotta make sure that you have the sticks firmly on your iliacs and sternum / shoulders. You aren't allowed to move the stick by hand. You must use the rotations in your pelvsi / ribcage to adjust the horizontal broomsticks to be parallel to the wall in front of you. Resist the urge to move your feet. Check your feet often.
Ideally, you would record all this on video and watch it after wards.
If you do the exercise properly, I bet you will experience some very unusual and odd sensations.
You may even find it impossible to keep your feet square and get your pelvis and upper torso square at the same time. But that's just temporary. You keep trying for a while and will figure it out. It will just feel very wrong.
Keep in touch if you have any questions. And let us know how your experiment went.