One, there is no post flood civilization that would be capable of building those structures.
Two, there is no ancient post flood civilization that records building those structures
The Egyptians. Although here are various proposed chronologies, they all have a continuous (in some cases overlapping) series of Pharaohs up to the sixth century BC.
Three, the testimony of at least one ancient society states that when their ancestors came to the land the buildings were already there
Well that is suitably vague. Is this how you got your doctorate?
When the ancient Romans conquered Egypt, the pyramids were already old. But they were still built by the Egyptians. So your claim, unsubstantiated though it is, is still compatible with the pyramids being built by the Egyptians.
Four, no ancient tools or plans have been found for those structures and NO real calamity has been claimed to have destroyed them (except the flood)
Paper and papyrus do not need a flood to get destroyed over the course of 3000 years. The oldest paper we have dates to around 150 BC. There are older examples of papyrus, but they are very rare. We would not expect
to find plans of the pyramids if they were built by the Egyptians.
As for tools, do you ever DIY around your house? Do you leave the tools where you did the job? Or do you put them away afterwards?
These were great monuments; why would you expect the discarded tools to be left lying around the tomb of the Pharaoh? Again, this is what we would expect
if they were built by the Egyptians.
Five, There are more doctorate degrees than a PhD it is best you do not assume anything or try to interpret my words.
Okay. What is yours? I assume it is a doctor that did not require you to present a thesis, given your reluctance to support your claims.
You keep tryiing to change my words to fit your narrative, stop doing that
You are insistent on avoiding supporting your nonsense. I am calling you on it. I appreciate that is not comfortable for you.