The wordpress “rewrite rules” have a horrible name which do not match what people are expecting it to be. Those are not rules to rewrite or redirect or whatever other things you can do with htaccess, but rules which are used to “rewrite” urls into the relevant WP_Query parameters. Therefor if you have a rewrite rule that do not end up with WP_Query arguments, you are using the wrong tool for whatever you are trying to do.
To go deeper into what you are trying to do…. just don’t. It is not up to the plugin or theme author to decide how the urls should look. Simple example for fail point – sites with no mod_rewrite and therefor no “pretty url” handling at all.
You need to figure how to properly configure angular to your specific setting.