The US isn’t the only place with an invasive fish problem. When I was in Japan, they were complaining about the bass and bluegills from the US. The bluegills were actually introduced by the emperor himself, and he apologized for that.
Yes, I’m afraid that our predecessors were not environmentally conscious, and introduced a lot of species where they should never have been present. I’m not blaming them; they really did not know the harm they would cause.
In Berkeley, CA, there is an arboretum where you can see the plant species native to NorCal. The familiar landscape of CA would look quite different without the ubiquitous ground cover of invasive oats.