While I understand your frustration, I think TubeDepot is pretty upfront about the reason why they ship free via USPS (cost) , potential USPS problems and that you have options if uncomfortable with shipping via USPS
Home page provides a link at the top of the page to this specifically, and the link - see below - has full details including reference to the problem you are encountering
Main page
https://tubedepot.com/USPS page
https://tubedepot.com/pages/a-note-on-usps-delays
FWIIW - FEDEX earnings call focused a lot on their own shipping problems caused by lack of staffing which are causing re-routing of shipments from optimum hubs to secondary ones increasing their ship times and costs.
Home page provides a link at the top of the page to this specifically, and the link - see below - has full details including reference to the problem you are encountering
Main page
https://tubedepot.com/USPS page
https://tubedepot.com/pages/a-note-on-usps-delays
FWIIW - FEDEX earnings call focused a lot on their own shipping problems caused by lack of staffing which are causing re-routing of shipments from optimum hubs to secondary ones increasing their ship times and costs.