The thing is, there has always been fantastic competition in the PC games market, between games themselves. To be honest outside of massive hits (Fortnite, Minecraft etc...), I'm not convinced the buying market is increasing at anywhere near the rate at which fantastic games are being made. Many great games fail for various reasons, don't find an audience, release at the wrong time, wrong genre at the wrong time, decide marketing is not a thing they need to do, poor support etc... The whole curation argument feels more like my game should succeed above all others because I made it and that's it.
I imagine that's why a whole lot of average devs have been successfully weaponised by Epic games, my game failed not because of me, not becuase the market is competitive but it's all Steam's fault and their greedy margins. Funny thing some are realising that Epic doesn't care about them, if you don't have a baked in audience they can poach from steam, Epic doesn't want to know you. Epic have done the same with every tinpot content creator, promised them referral riches. In a highly competitive creative risk-based industry some, many, projects will fail and some will suceed. If you want a guaranteed income become an accountant.