To summarize, the 7900 XTX is generally on par with the 4080 in rasterized gaming and on par with the 3090 Ti in ray traced gaming. He questions whether the $200 savings is enough to make it more attractive than the 4080. Performance is also disappointing compared to the 6950 XT. That's mostly what the "overhyped" and "underdelivered" in the thumbnail refer to, since AMD led us to expect 1.5-1.7x the performance of the 6950 XT and they saw only 1.4x. Claims aside, the closeness to the 6950 XT could mean room for driver improvements.
I feel the only reviewer who thought very highly of it was Linus of the ones I've seen. Seems most are basically saying while maybe not as egregious as the 4080 in price to performance, it's not really the kick in the butt people thought Nvidia needed after the price to performance on the 4080. Seems AMD hasn't really launched either 7000 CPUs or GPUs particularly strong this year, which isn't good for consumers since the two areas they compete in for regular consumers (so not thread ripper or Epyc level CPUs) are controlled by two companies (GPU-Nvidia/AMD, CPU-Intel/AMD).