Thank you for your question. I look forward to working with you to provide you the information you are seeking for educational purposes only.
If you provided proof and evidence that the records were false or exaggerated, then the IG office will order correction to the military records to reflect the truthful and correct information.
As far as grievances you can file, you bear the burden or proving the physical or psychological abuse. This means you would have to show injury from the abuse or have witnesses testify to the conduct that constituted abuse.
The vulgar language is a minor violation, but it is not a violation of policy to yell at anyone, it is the military.
You are in the military, they OWN you, meaning they can decide when you eat, sleep, shower, go to appointments etc. They are in charge, you do not get to make the rules as a soldier, the superiors do. If your superiors were not following the rules, then you need to file a grievance based on what rules they did not abide by.
Them denying you leave, that depends on whether or not they had good cause to deny the leave and you would bear the burden again of proving they IMPROPERLY denied leave without good cause.