Definitely not. There were a lot of cases when scam projects were given something like 4/5 or even higher:
https://bitcoinexchangeguide.com/able-project-ico-exit-scam-for-ablx-token-sees-trackico-and-coinrail-as-culprits

It is impossible to qualitatively evaluate many projects at once, here they need a huge team of analysts, which they clearly do not have.

Ratings are sold, and on that they earn