I was almost like OP for a while. Working on game, fed up with existing languages (even C), wanted a better C. I was excited about Jai, but as time goes on I'm finding it looks less and less what I want from a language. Seriously considered making my own.
Then I started working with Zig[0]. It's about 90% the language I want and even though it's still immature and the syntax, std lib, and semantics are in flux, I still find the quality of life improvement so huge that all my current projects are in Zig.
Zig is a better C to Jai's better C++, I think. It's a small language, it favors simplicity and explicitness, it has entirely manual memory management to the point that there isn't even a default allocator (we pass one in to anything that requires one). It even lets you import C headers directly to interface with C libraries.
(skip the "stable" 2.0 download, it's way out of date from master)