The Epic launcher is an unmitigated disaster that has barely improved in library management capabilities since it launched. I'm not sure if they fixed it but last I used it you literally could not see the download size of the game you're downloading and the controls for changing the queues are non-existent. The launcher is also the biggest resource hog of them all beating Origin and UPlay which is an achievement in itself. I am not wading through how troublesome it is to use what should be a fairly well featured launcher after 4 years of launch to support a "competitor". Discoverability on the store is also awful when Steam has been working on this space for over a decade to try and highlight indies. The reviews system is also incredibly inferior.

If I have to use some third party launcher to make up for what it lacks, I might as well use steam