The included screenshots from the ITER website don't claim what he says they are claiming. And note that he carefully avoids pointing out that in the same screenshots there are phrases that explicitly say that ITER won't be used to produce power. A simple visit to Wikipedia[1] should have been enough to understand this.
Sure, a naive reader may fail to grasp what the "50MW in, 500 MW out" claim refers to... but I would also argue such a naive reader is probably not interested in the inner workings of nuclear experiments. That's why for such readers it's always spelled out that the experimental reactor won't actually produce electric power.
Frankly speaking, this article seems a blatant attempt to gaslight readers that may not be familiar with what an experimental reactor is supposed to be, or how it's supposed to work.
[1] https://en.wikipedia.org/wiki/ITER#:~:text=As%20a%20research....