Yep ! I read reviews... a lot of them and I have noticed the same things.

More people who are unhappy seem to take the time to come complain about things than do people who are satisfied with their item. I also discount the bad reviews if they are not directly related to the actual product. Sometimes it seems like someone's review is for a different product than is shown. Not sure how that happens, but it does.

You do have to read between some of the lines for sure in order to try to discern which reviews are actually valid.