Implying that something was once excellent, then pointing out that the service is no longer excellent isn't exactly bashing. If something is free you shouldn't

Implying that something was once excellent, then pointing out that the service is no longer excellent isn't exactly bashing. If something is free you shouldn't be able to post your negative yet completely truthful experiences with it? There are plenty of free services that people rely on. If you relied on free email service like Gmail and you began to receive just 1 in 10 emails sent to you, would you feel like you had the right to post a negative account of your experience?