Didn't we saw that already with "forked" Bitcoins? Solving all of those issues that they don't like about Bitcoin, telling to upgrade it to become better.
What they did ended up?
They ended up being shitcoins of the market and they've never been popular again. Bitcoin is Bitcoin and there's no need for any replacement of it and some developers trying to do the same thing and keep the features that it's got because it will never make it the same as the actual BTC that we've got.
That's true! How many projects have tried their very best to create a much "better" coin than bitcoin? And yet, they are nowhere in the market right now. Those forked bitcoins are just trying to survive. Bitcoin Cash and Bitcoin Classic are just few examples. Though they are still in the trading market, but the eyes of crypto users are mostly in bitcoin. Hard to hold long-term these forked bitcoins because the risk is quite high on these coins.
Well, if BTC is no doubt the best.
There will be the enthusiasts think that they can create better. Instead of contributing to the development of the actual BTC, they want to prove that they're better than the others and the one existing.
But it's not going to work and no can do with that because whatever the community dictates, it's here to stay and that's the king which is Bitcoin, no other than that, no fork, no altcoin.