I kinda noticed that people will just easily call a project scam without even researching about the project, their judgement is solely based on the price and does not consider that most altcoins are affected by the bear market. If they can't change their mentality, this would affect the reputation of the project, this is like destroying a project's reputation in bad times, instead of helping them.
Honestly, the biggest reason is lack of communication from the teams and failure to keep doing something. If a project is fine and there is nothing wrong with it and team is not a scammer and actually decent, people could still call it a scam if they do not work on the project constantly, I mean you can't just expect to do a project and when you release it just be done with it, that is not how it works, you need to actually work on it and make a difference every 3 months.
However, there is also fact that even if you do not do too much, you should at least talk with the buyers, on telegram, on slack, on discord or whatever you want and keep it updated, your twitter feed should be 3-4 tweets per day at least, keep in touch with the world. When you do those two you won't be called a scam.