This is the truth, and it's not really much better in non-GCed languages either. (In reality my impression is the GCed wasm side runtimes are even worse).

Some of the least fun JavaScript I have ever written involved manually cleaning up pointers that in C++ would be caught by destructors triggering when the variable falls out of scope. It was enough that my recollections of JNI were more tolerable. (Including for go, on Android, curiously).

Then once you get through it you discover there is some serious per-call overhead, so those structs start growing and growing to avoid as many calls as possible.

I too want wasm to be decent, but to date it is just annoying.