From my experience, I believe A LOT of Canadians have an inferiority complex to the United States.Why I don't know, your country has plenty to be proud of, maybe it's a matter of not being a big player on the world stage?
I've spent a lot of time in Canada and have lots of long time Canadian friends and they can't help but take shots at the US, of which I never reciprocated. I used to play in volleyball tournaments across the US and Canada, so I've visited there often.
One of my first experiences was back when the Canadian dollar was at 40% of the US dollar. So we're checking into the Canadian campground and the guy at the counter says something about how we must love the exchange rate, so I say "Yea, it's great for us" or somesuch and this other Canadian guy goes into a speech about while the dollar is worth less, they make much more per hour in Canada and in the end they are probably better off. It was just so weird from an off hand comment about the exchange rate that I didn't even initiate.
So we're at a communal campfire that night and again the exchange rate comes up and again some Canadian jumps in about all the things better in Canada, yada ,yada, again totally unprovoked. I remember saying to my wife later that evening, "Do Canadians seem a little sensitive about the exchange rate ?" It was so weird.
Another one of the big jokes was always along the lines of "Careful or we'll come and burn down your White House again" . That was a big one, heard it all the time. Now, I'm not a history buff or anything but I remember it was the British that burned down the WH. But I heard that joke so many times I had to look it up again and sure enough it was the British Army that was stationed in Canada that did it. And even if it had been Canadians you'd need to hang your hat on something that happened 300 years ago, like it matters now?
I remember a few of our Canadian friends got injured ,two knees that I remember and when I showed surprise at how long they had to wait to get surgery it turned into a US vs. Canada health care "discussion".
I'm still FB friends with a lot of them and I guess they forget or just don't care what we see but they constantly post memes and posts dissing the US. Rarely and I do mean rarely do they post anything about Canada at all.
I realize this is all anecdotal and maybe doesn't reflect on the majority of Canadians but it's just some of the things I've noticed through the years.