With VS, and it still doesn't do anything when it is something broken at the browser level, CSS, HTML, JavaScript, that the VS debugger provides zero information, just like with WebForms.
I'm not sure I've run into such a state yet, are you using Blazor without any UI component libraries? I am using MUDBlazor, genuinely curious what you're running into.
I used it enough to understand how it works, compare it with my WebForms, GWT and JSF experience since their early days in 2001 onwards, and decide to stick with MVC, and browser native stack.
Additionally, our agency is polyglot, and in no way frontend teams are going to start doing Blazor instead of their favourite framework of the month.