Imagine if you had directed those hours towards learning or training some sort of skill. You would, almost certainly, be in the top percents of humanity by now at that skill.
It's not just about innate inability but about dedicating yourself to something of value. The reality is that the overwhelming majority of people choose not to do that.
But the point I would emphasize is that this is a choice.
It's actually quite the issue as well, because it's so enticing to choose to do nothing. Would Einstein in an era of endless entertainment, banter, porn, and so on have nonetheless chosen to spend his days wandering about pondering the mysteries and paradoxes with the speed of light?
I mean maybe...? But there's a strong argument to be made that we haven't done away with meritocracy but rather made it fabulously enjoyable to do things of no real merit.
There is something to be said about solitary (socially and intellectually) activities being bad, but i would not be anywhere near the whole person i am without my online experiences.
Before global media, for the most part if you were comparing yourself to other people it was largely comparing against your friends, family and community. Sure, there may have been that one outsized success, but it still wasn't presented as the norm - you knew all the other friends and family that just had average lives. And for most of human history where social ranking was explicitly classed based, it's not like if you were a peasant you would think "Darn, if I only worked harder I could be a noble".
If you want to feel "less hard on yourself", I highly recommend disconnecting from digital media. It's hard for our human brains to deal with the constant onslaught of stars/celebrities/moguls/exceptions and understand how rare those examples truly are.