My take on this is no they don’t. As long as they are truthful they only report on the quality of the product and prevent many people of spending a lot of money from losing it by buying something that doesn’t work.
If your product is shit your company does not deserve to be shielded from the backlash, this is the core of (classic) capitalism after all.
who gives a fuck about companies?
Companies also include small genuinely good startups and a dishonest negative review could ruin them.
Maybe the people who lose their job when they go under. That being said we shouldn’t prop up a bad business just because people might lose their livelihood