Bros how the fuck do I fix this body?

Hyperlordosis. Your ab and glute muscles are inactive. I also had it. I fixed it by doing exercises that require ab and glute activation. For abs, just whatever ab work. For glutes, stiff legged deadlift, since there's no stretch reflex to bail you out, and it's all glutes. As often as you can. Like a couple sets every day. It's not to build muscle/strength, it's to create the neurological connection to the muscles so they're more tense.

This posture can be modeled as a forward tilt to the pelvis. To understand how to fix it, think in terms of tensegrity.

Bones don't touch, there's no inherent rigidity to the human frame. Bones float inside a suit of muscle and connective tissue and water, which apply pressure and force to keep bones in place.

Stronger muscles apply more tension than weaker muscles. So let's consider the pelvis in that context.

Translation of the pelvis is not of concern. Skeletal structures prevent movement up, down, and side to side; center of gravity and balance prevents forward and back translation. So we get to focus purely on sagittal plane rotation (forward or backward tilt).

What impacts pelvic tilt? The balance of forces applied. Upwards forces come from the spinal erectors at the rear, and abs and obliques at the front. Downwards forces come from the glutes and hamstrings at the back, hip flexors at the front.

To tilt back towards neutral, you'll need more force from the glutes, hamstrings, and anterior core as well as less force from the hip flexors and low back.

How to get more force is easy, get the muscles stronger. Focus on strength training and proximity to failure in isolation and compound movements including RDL, hamstring curl, step up, and hanging leg raise.
Reducing force from the hip flexors and low back takes more tact. 95% of people are "tight" there because they're weak there. The brain isn't confident in those muscles, so it tenses them to keep them working. What you need is stretch under load and full ROM training slightly farther from failure with those muscle groups. Seated good mornings, cable pancakes, deep stretch hip flexor raises, and Jefferson curls. Start LIGHT with these, forcing that feeling of stretch and discomfort in the target muscle groups.

This, combined with a decent beginner strength program (Phrak's Greyskull, 5/3/1, SS, Texas Method, etc) will solve this in 95% of people within a year or so.

Back to wall exercises.

Fix your pelvic tilt(pic related)
Fix your thorax tilt(hunched back)