It really depend on the post office you deal with.What is the problem with Canada Post?
In the small town where I live, everyone in the local post office knows me.
The person who bid on and won the contract to deliver mail to the boxes and parcels to the door, will seldom delver the parcels but put a notice the parcel is at the post office for pick up, because she's quite WOKE and anything that may or may not be firearms related scares the heck out of her just because.
Every time I put a parcel in the mail, the clerks will at the very least ask if it's something dangerous. They have no idea of what's dangerous or what isn't, then they will ask if it's a firearm or parts for firearms.
I politely tell them the laws and regulations concerning Canada Post shipment and it goes in one ear and out the other as soon as I leave.
Some post offices are totally functional and just want to speed up the process as much as possible, without hassle.
Mostly, I print my own shipping labels and that stops a lot of the BS.
Businesses get a lot less hassle than individuals.