This is false. Angular 2 is a remarkable improvement over Angular 1. I started off with Angular 2 and Angular 1 code makes me want to barf. Typescript is a major improvement over vanilla javascript.
I agree with you. I came from a native app (macOS/iOS) background and joined the team maintaining an AngularJS app, and also worked on an Angular 4 app.
I felt like Angular 2 was the Angular team repudiating all the mistakes they made with the original AngularJS.
They don't even seem comparable. I too want to barf each morning when I work on the ancient JavaScript AngularJS app, and then moving in the afternoon to the more modern Angular 4 project, written in TypeScript, feels like stepping out of my time machine back into the modern era, with a spring in my step and a cool breeze wafting through my beard.
I would have no objections to joining a modern Angular project, whereas I would absolutely, positively never join an AngularJS project again (unless the fate of the human race depended on it, or something like that).
Love Angular and it's definitely a modern framework. Ironically it feels like I'm going back in time to old school RAD development with Delphi. I've been following Anders Hjelsberg all my career.