Changed more teams to copy his approach than to try and counter it.
If some teams changed for worse that is on them.
Nobody changed for worse. Only bigger of teams raised their level for their own benefit and nobody else's.
On the offense teams copy since easier to exploit the poorer sides.
On defense they copy the approach that is meant to neutralise the offense they themselves employ, as this is the way most opponents anyone faces play these days.
Either way it's become immensely more boring, mechanical, detached, uninspired and dehumanized than anything played before the Pep Barca was a thing.
I think you overdramatize Pep's role as this villain. Clubs were not exploited. Every manager and player on the planet witnessed what happened on the night of 28 April 2010 and took note how to neutralize Pep's tactics. Monumental episode that changed football forever. Jose Mourinho decided to apply Helenio Herrera's Catenaccio against FC Barcelona with 2 goals lead. The rest is history, the famous pitch invasion, Victor Valdes, sprinklers...
Nothing dramatic about it really. Other than the degree to which Pep has created a mass-consumption model of how a good team is supposed to play.
Of course it's based on exploitation. All sport is. Except Pep's way destroyed any chances of accidental mobility across leagues, because managers also think they'll only ever be successful with better players.
Luckily at least Klopp made it so that people run more in a more athletic world and Zidane has caused a surge in self-sustained confidence coaching (i.e. if you have self-esteem and you're talented, you'll play well) in order to counter this sterile vision which permeated through football since 2009. Now there's more activity + confidence on the pitches rather than exasperation when you either suck at doing the uber-control model of Pep's and fail at it, or resignation to your own fate when you can't compete against those that employ it well.
Thank fuck there are still managers that can save the world from the bald visionary's dystopia. Also created from own complexes about overcoming exploitation anyway, so it's mildly understandable how it came around. Control-freaks never design such models with intrinsic good in mind.