It depends on what changes they made. Reddit is fairly left-leaning so if they start seeing more right-wing content or racist crap being allowed on the site, it might happen.
People quit X because it allowed notorious racists and neo-Nazis back on the site, and also did dumb stuff like not allowing people to unfollow Elon Musk (it will automatically re-follow him after some time). It also prioritised and propagated right-wing content which, shockingly, left-wing users didn’t like.
Au contraire, mon amis.
From an American perspective, Reddit is split between liberals and progressives with a minority of socialists and conservatives.