I don't have knowledge about Svelte so you may be right about it solving all those issues. My contention is with regards to the general idea of the article and some comments that seem to indicate that everything was good in the web development world before React introduced a bunch of problems. React did introduce some problems, but to sell me on migrating I'll need to see that the new framework solves the issues inherent to web development, not just the issues that React created.
I do not think that is a charitable view of the article or most people's comments. We all knew what was gained. We just bemoan what was lost, much of which has been found to be largely unknown to more recent entrants into the field.
Folks aren't against solving problems. I think the main concern is the amnesia regarding problems that had already be solved and are now be solved again only not as well.