I have never got a bag with bad reviews, so I do not know how it feels like. Before I purchase a bag, I would check the reasons for the reviews (good or bad) and take them into consideration. Most likely I would stay away from bags that have many bad reviews.
Flip your question the other way. I would definitely consider bags that have great reviews. However, I may not buy them if I do not agree with the reasons behind the great reviews, or if the reasons do not pertain to my needs. For example most people love to use the much admired and desirable Hermes Kelly as an everyday bag. I would not buy it as an everyday bag, because I find it inconvenient to get in and out of.