We could still feed them before, the difference being not everyone had access to the latest goodies, which by the way many still don't as the Industrial Revolution isn't evenly distributed.
What do you mean by that? Before the industrial revolution starvation was widespread in human populations.
What I mean is that you don't have to eat nice steaks and a full fish every day, sometimes twice a day.
It's not true, despite population increase number of people dying of starvation goes down https://sites.tufts.edu/wpf/famine/ the reason of starvation in modern times is political, not production shortage.
How many farming fields and insects have been destroyed with chemicals and genetic modifications from that wonderfull revolution?
Humans have been destroying habitats for as long as we find ourselves in the fossil record.