I know this post seems funny but modern Epic has done a huge amount for the industry.
1. Their Unreal Engine 5 is the reason why half the games in the industry even exist today (Including this years expedition 33) and they're only expanding the engine as time goes on.
2. They have sued the biggest companies of the world (Apple and Google) all over the planet and have fought years and spent billions to get results scraping off their closes ecosystems step by step.
3. Fornite has introduced a HUGE amount of people to video games, some of whom have taken the plunge in AAA premium gaming as well.
4. Even the existence of stores like Epic, even when failing, keeps Valve from knowing how important it is to not make their services worse. They know there are vultures sitting around just waiting to pounce if it ever slips up (although pc users will just shift to piracy to be fair).
And, in many ways, we owe this to PUBG Battle royale Mode blowing up which led to Fornite and Epic getting billions but that's a conversation for another day.