This is a real problem that I have experienced on and off. It's getting to the point where everyone on my team is actively looking for alternatives. Generally, I've found Cursor works correctly after business hours. But, it's increasingly giving absolutely useless responses during business hours.
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That being said, I agree with many of the author's observations. However, for me, it's not really a breaker. It's not much different than working with an intern or junior engineer. If you ask them to do too much all at once, they come up with bad solutions. Plus, they have a tendency to make "dumb" decisions.
For me, I've found solutions for nearly all of the listed issue. Much of it comes down to being diligent during code review (like you should). For example, the Typescript issue, I come back later to have it fix it.
Specs are the one that still baffles me. It's absolutely terrible at writing proper specs. In particular, it falls into a really bad cycle whenever there are errors. I don't have a solution for this one.