You have mound builders and totem poles but the Maple Leaf Land monument is harmonious living being spoiled by drillers pipelines and churches funded by taxes

We're not the type to make a big deal of thing. We even get anoyed when people stand up, get excited, and dance in front of us at a rock concert. True story.
Or is that just Ottawa?

nobody was building mega-structures 15,000 years ago.....

Serpent Mounds Provincial Park comes to mind. [pc.gc.ca]
Tabor Hill in Scarborough, ON [trca.ca]

It was too damn cold to spend the time outside it takes to build such structures?

Probably because many Aboriginal groups were nomadic and building such things would be futile if you moved from place to place constantly. Also, their relationship with nature and respecting it and not wanting to cause any undue or Unnecessary damage to mother earth. Those are my guesses if what you claim is accurate.

If you look at the peopel that were in the country when the Europeans arrived you will find that they were still in the stone age! They did not even have the wheel! It is pretty hard to build large structures when you have no tools!

Not all humans felt a need to build mega structures?

Same in Malaysia. Nothing before 1600’s when the Portugese showed up.

Most of the indeginous people ,Canada was just a path way to the south and had no interest in building those types of strutures in our climate,undestandable because of the cold ,just a thought,wood was the prime method but decays , Mega ice structures melted in the spring and got tired of doing them over and over lol?? Plus Canada was still recovering from the ice age a lot longer than further south ,so many reasons i would imagine,,hard to know what,,maybe someone has a corrct scientific answer??//

Or things melted every year.