Mark Wiemels appears to be very critical of the Canon EOS R7, calling it “a Broken Camera” in one post, and he also has a video titled “The Canon R7 - Does Canon Even Care?” that suggests frustration with Canon’s handling of it.

What that implies

His take seems less about the R7 being unusable and more about disappointment with its flaws, product decisions, or Canon’s priorities. The wording in the available sources points to a strongly negative, opinion-driven stance rather than a neutral review.

Related context

Other Mark Wiemels coverage in the same vein shows he often compares APS-C gear seriously and can be blunt about tradeoffs, which fits the tone of those R7 comments. But from the available snippets alone, I can only confirm that he spoke negatively about the R7, not every specific complaint he made.

TL;DR

He seems to think the EOS R7 has real problems and that Canon may not be treating it well.