The version of ESLint you are using.
7.28.0

The problem you want to solve.
Now both real code errors and ESLint errors appear at the same level in IDEs with red squiggles.
I can see an option to change all error severity to warn.
It would be nice to have yellow squiggles on ESLint ones (Now we have to manually list every rule and change its severity to warn)

Your take on the correct solution to the problem.

{
  severity: 'warn',
  ...
}