How about a room measurement and desk/furnishings measurements?

Acoustical improvements, rather than rearranging.

add as much textile/fabric as possible,upholstered chairs, rugs, drapery panels, panels for sound deadening are avalable online... look like stretched canvas'

I see the ceiling is already panels... even some white noise.

rather than individual desks, can you create a large desk? Is there any natural light? or are all the windows fixed?

Windows do not open so we have natural light but I think it’s the flow/energy of the space that’s drains us

I need a to scale floor plan every inch marked celarly . Is ther ea eason fiel cabinets cannot be done so ech person can have a section then only one large one. Maybe explain the nature of your job. IMO if some users are loud then your boss needs to look at more space where there is some division to control sound.I think without the plan there can't be much help. We also need a lot more info. To me since ther eis no issue sharing a space surely there is away to share cabinets , bookshelves and file cabinet.

What is draining you is the lack of ventilation. If you can't'open a window, you should have several HEPA or MERV air purifiers in there. The very quietest and most effective air purifiers you can get are from Clean Air Kits. If you are willing to assemble them yourself (10 minutes) they cost less than the purifiers that come pre-assembled for you.

These are still equivalent to anything you can purchase from a big box store. If your boss will only buy a brand name, buy Levoit Core 300. But Clean Air Kits (designed by Corsi-Rosenthal) are not only quieter they are more effective if you need to place them near walls or close to big desks.

https://www.cleanairkits.com

https://www.bestbuy.com/site/levoit-core-300-true-hepa-air-purifier-white/6462880.p?skuId=6462880&extStoreId=549&ref=212&loc=1&gclid=CjwKCAjwseSoBhBXEiwA9iZtxiq_v7yTF9MGsdWQpUbmIT_oB_6rAl4iLNHt_9eZDSnVVmyMgwllVxoCM0UQAvD_BwE&gclsrc=aw.ds

No matter which of these purifiers your office buys, the office will need to purchase more than one purifer based on the size of your office and the number of people working in it so you can position them around the space fairly. These purifiers are small. About the size of small wastepaper basket or a six-month supply of printer paper boxed. They are extremely lightweight and easy to move around.

It would help if you could do a thumbnail sketch of the floor plan, nothing fancy. First, take overall dimensions. Then, start at the corner and go around the perimeter of the room, measuring everything - corner to window > window > wall > corner > corner > door (including frame) > wall, etc. You get the idea.

Then, measure the desks and cabinets and the count.

I'm sure there is a way to figure out a plan that works and some sort of sound proofing.

I would love to help.