It usually surprise me when I see investors complaining about a good project that didn't increase or providing returns immediately it got listed on the exchange and they term it scam or say different things like rekted.
But the truth is, are these investors investing in the project because they believe in it or are they just in it for the immediate profit and move on? Because if you are investing in a project because you believe in it then you should be willing to HODL the tokens and wait for the team to gradually deliver the project and meet its necessary roadmap before you judge it and not condemn it on its first listing.
In my own personal opinion, investors became impatient because they are now getting scared to take some risk in projects which they believe that it is successful, but it turns out to be a scam or the coin will don't have a good value, that is why investors is starting to judge a lot of projects nowadays because they didn't receive any good profit from it.
That does obviously have the affect to the market psychological as well as investors' but it's still improper to be really impatience and demanding fast profit. all these projects aren't quick cash that could make you rich overnight everything needs process. Although there might be many garbage project out there but there still some of good projects that deliver what it promised.
If the investors are just there to dump their token at the distribution date then I assume the project's token will be done for thus lacking the fund making realization or execution of the idea harder.