The guy's ranting about Typescript with no strong arguments to back up his diatribe.

He also described the experience of writing simple apps that resulted in very poor performance. From my experience, you'd have to really hard to re-create non performance scenarios. Especially if he is only creating simple use cases

In summary he is ranting about fairly superficial points that does not cancel out the benefits angular framework provides for certain types of organizations, when compared to vue or react..