Stamps not canceled, and probably insufficient postage so it is very likely that some or all of these were hand delivered or entered the mailstream in a sorting facility through an employee rather than passing through a post office.
Yes, very ham-handed effort. I’m guessing it’s some lefty college student unfamiliar with the use of postage stamps, how the USPS operates and scans mail, and is too young to remember Road Runner and Coyote cartoons for reference.