Then there are people who will criticize just about anything for the sake of doing it. Just ignore those people and make a day more interesting for the people who share your passions.
I would love to imagine I could be the next Andrew Kelly (creator of Zig), I don’t know that I can actually be a language founder.
Nevertheless I think there is space for experimental/research languages. Just don't burden yourself thinking in terms of "this is the next great thing" and it will be fun, and perhaps your work and the ideas underlying it will even leave a mark, even if that doesn't necessarily mean that the particular incarnation of that particular language will ever reach adoption.
We not only stand on the shoulder of giants. We all stand on the shoulders of billions of dwarfs.