I don’t know if UPS going into the states is the same as Canada, but you can avoid the clearance fee by not shipping with UPS ground. The higher levels of UPS service do not have the bullshit fee added on, and you just pay the cost of taxes.
[1]: https://www.cbsa-asfc.gc.ca/import/courier/lvs-efv/menu-eng....
In a perfect world, we would just outlaw brokerage fees, and just have CBSA do the clearance since all of the information is already input in a computer system. We should at least outlaw forced brokerage. I never agreed to have UPS act as my agent, so I get pretty upset when they charge me a fee no one agreed to.