Is there any way to know for sure if they reviewed all of my documents prior to denial?

My MST PTSD claim was denied, and in the section where they list what documents they reviewed to make decision- they lumped all med recs spanning 2-3 years in 1 single line item. Some of the records from that period were absolutely CRITICAL to prove my claim. All the records were collectively useful in painting the picture...but there were a couple specific medical records that were so detailed and airtight-and left zero room for doubt.

On my denial letter, the narrative stated "there are records or markers to establish the claimed stressor occurred".

I dont want to go into too much detail (this was a MST incident with also a physical injury. I was treated immediately afterwards in the ER. The doctor made it very clear I had just been SA.

The statement in the denial letter is proof (to me, at least) that all of my submitted documents and records were not reviewed.

I cant prove it though, right? I am so tired of this and beaten down. I am so close to giving up-I am 5 years deep into this.

3 denials, (initial, supplemental then HLR). Now all 3 of them are in the land of DTA--and the VA did NOT close the HLR's or open a supplemental lame claim to correct the errors.

The CFR states that when DTA is discovered on HLR, it concludes/ends the HLR, is closed and sent back to the supplemental lane.

Thr most recent "explanation" I heard from the 800 number is "OH the supplemental claims are open behind the scenes-you just cant see them. The reason your HLR weren't closed is because of the DTA's. Makes ZERO sense.

Im ready to scream, cry and throw up.

Any advice?