Instead of stereotyping the entire ICO market, I think you should question your buying choices. The coins you mentioned were not even worth investing and a price drop was going to come sooner or later. So, you didn't use your judgement correctly. Apart from that, at times luck doesn't work in your favor and good coins do end up losing their value. But, this shouldn't be your judgement criteria and you should look at the success stories of good coins before demotivating others.