I think "miscreant" is probably the strongest expletive Robert E. Lee was capable of.
Union (!) Major General Fitz John Porter used a term more familiar to us today, that starts with an "a" and ends with "ss" (outstarred in the text below):
Pope's first substantive orders to his "Army of Virginia" dictated not the movement of his troops, but the behavior of his army. He permitted men under his command to requisition food from Virginia farmers. He demanded oaths of loyalty from male civilians within Union lines in Virginia. He dictated that local civilians would be held liable for damage done by Confederate raiders. By modern standards, these measures seem mild. But in mid-summer 1862, they seemed radical and, to some Unionists, offensive. Leading the chorus of disapproval were McClellan and his closest confidant, Major General Fitz John Porter. Porter labeled Pope an "***," and predicted, "if the theory he proclaims is practiced, you may look for disaster."
Another military officer in Virginia likewise reacted to Pope's verbose presence in Virginia: Robert E. Lee, the newly minted commander of the Confederate Army of Northern Virginia. Lee called Pope a "miscreant" (strong language indeed from Lee) and declared that he "must be suppressed."
https://www.civilwar.org/learn/articles/miscreant-suppressed
"He permitted men under his command to requisition food from Virginia farmers. He demanded oaths of loyalty from male civilians within Union lines in Virginia. He dictated that local civilians would be held liable for damage done by Confederate raiders"
That's just a continuation of what Pope and Hurlbut did here in Missouri in 1861 while in the field against the MSG.
Look at Popes general order no 3 dated july 31 1861 issued from Mexico Mo in OR, it detailed committees to assess the cost of Union troops being required to maintain the peace, which was later expanded to assess property damages to the citizens too
as to reqiuistion read Hurbuts To the county authorities of Marion county mo 1861 dated Aug 11 1861 where he required a list of provisions to be delivered every day. "the county of Marion will be also held responsible and compelled to pay all cost of transportation , ect, of this expedition and of its support while we are here" He also threatened to if the provisions weren't supplied to billet his command in private residences..............
Heres one of my favorites
Brigade headquarters
Hudson Mo Aug 19th 1861
To the mayor and Authorities of the city of Palmyra, State of Missouri:
You are hereby notified and required to deliver up to the military authorities of this brigade within six day of the presents, the marauders who fired on the train bound west on the Hannibal and St Joe railroad, on the evening of the 16th inst.,and broke into the telegraph office
If the guilty person are not delivered up as required, and within the time herein specified, the whole brigade will moved into your county, and contributions levied to the amount of $10000 on Marion County, and $5000 against the city of Palmyra
By order of
Brig Gen S A Hurlbut
Under directions of Brig Gen John Pope, commanding in North Missouri .
S M Preston asst adj gen
If he with 600 soldiers couldn't capture and deliver up the marauders, how did he expect the mayor and sheriff who had 0 soldiers to do so................ this one was fortunately countermanded by General Fremont. And they couldn't figure out why the opposition to them was growing as they ran around just arbitrarily assigning blame and damages..........