I try to rate games fairly, but I often feel guilty when rating a game poorly. Overall, a bad rating will only lessen exposure for the title, as it brings down the rating drastically (if the game has few ratings). I'm not the kind of person who considers ratings before buying and playing a game, but many people do, and that's completely justified in a market full of games.
That said, I like to rate games. I'll often re-rate a game when I return to it. Sometimes I find that my ability to re-rate a game higher or lower than I had before is revoked, which kinda sucks, honestly. But I get it -- these works have been poured full of love. Nobody on this site makes games against their will.
Stacking games against each other isn't easy, but making games is way harder. So I will rate games a five out of five from now on, regardless of quality. The collections on my profile list my actual scores for the games I rate. Hopefully this won't make anyone unhappy.