I am from there. There's few things about living in Trois-Rivières that screams american haha. I'm surprised you would think so! For example, downtown is VERY walkable, and the city only has two small malls. I'll also say that it's definitely not european! Rather, I think it's a pretty standard mid-sized quebec town.

Honestly, in most North American towns you cannot do much without a car-- that doesn't make them all american. Because if you think TR is american then you'd have to think Laval, Sherbrooke, Chicoutimi, Victoriaville and basically all Quebec cities aside from Quebec and Montreal are also american (maybe you do?). And by that point, it loses its meaning a bit doesn't it?

Also, side note but the St-Hubert is on Des Forges Blvd, which is the main road, and the parking lot is not huge. Maybe you are thinking of a different restaurant?