EDIT: RE: Valve and Darwinia:

https://en.wikipedia.org/wiki/Introversion_Software#Financial_history_and_independence

Darwinia was eventually released in March 2005, but despite a strong opening weekend, sales soon slipped too low to sustain the company. Within six months, the developers were back on UK government benefits until November, when they contacted Valve "on a whim"[10] to try to set up a digital distribution deal on their Steam platform. Valve responded enthusiastically and, following a 14 December 2005 online launch, digital sales, which exposed the game to a new, global audience, kept the company going through to the release of their third game, DEFCON.

Valve didn't reach out to Introversion to make demands, they actually saved the company. For a game basically no one had ever heard of and abysmal sales for were about to make the company go bankrupt. Valve didn't pay for this exclusivity. It is however true that 18 years ago, they had an exclusive game.

This is a big difference compared to Epic paying 2K for exclusive access to Borderlands 3 so they can secure the profits of a huge franchise. Epic pays big companies big money to secure early profits to exclusive titles. Valve may have technically had an exclusive game, but Epic's business model is literally paying for exclusive access to the biggest games they can get, so they can get the biggest cut of the sales at the highest price point, before discounts.

Only one of these two companies is trying to "Pay 2 Win."

There really isn't. This is personal opinion.

Some of us just have issues with Epic Games. Some others have issues with Valve.

No private company is really "good."

But the argument with Epic is things like:

• They brought "exclusives" to PC gaming for the first time. Previously, a PC game was a PC game, and it didn't matter what storefront you bought it from, because it was available at all storefronts. Epic chose to pay companies to restrict their titles just to Epic, in an attempt to move the market towards them.

• In a similar vein, trying to fight Valve's dominance, they started giving away free games. They have been firing people left and right because their financials are in the toilet, and yet they're still pissing away money on free games and exclusives to their store.

• People who care about access to music and paying artists hate them because they have effectively put a death warrant on Bandcamp, buying them for two years, doing nothing with the product, and then selling it to Hedge Fund fuckies who already shitcanned half the staff and the site is officially on life support. They basically killed the last place you could buy music and make sure all the proceeds went to the artist and not a middle man (Bandcamp Fridays).

• During all of this, they refused to spend any money on actually improving their fucking game store. Things that have been staples of Steam for a decade now are still on a waiting list of features to be added. The User Experience for Epic Games Store is just bad, bad, bad, bad. There's no excuse for it, especially when they chose to piss money away on exclusives and free games instead of paying people to produce a better product than Valve has. They refused to even try to release a better product, believing they could buy their way to dominance.

Do you really want to support a company that doesn't give a flying fuck about your user experience as a customer and has such bad business plans that they're letting go tons of staff? It's bad enough that they had a bad business plan, but it also seems like they're not very good to their employees, either. Compared to Valve's "flat" management where there are no managers, or where Newell famously paid the writer for Portal to "be sick" for two years while he had a serious disease. "Your job here at Valve is to get better." This was before he wrote Portal, no less.

One company clearly cares about the user experience that their users experience, and one clearly cares about using every tool at their disposal to be the top of the market, everything from paying for exclusives and free games to suing in court to try to carve out a niche for yourself where you don't have to pay vendor fees.

Of course, I also encourage you to do your own research and come to your own conclusions. Valve offers a better product, better user experience, and treats their employees with more respect, but it doesn't mean Valve hasn't made their own share of anti-consumer decisions.