Since last few months almost majority of trader/Investor are seems like hopeless or bored from this dead marked,
I cannot say with 100% certainty but a lot of members in this forum has somewhat turned "negative" against altcoins until now and that's probably where your statement is coming from. Outside this forum, I still see a lot of guys on twitter and youtube hunting altcoins on different exchanges and discussing them on their platforms.
D) Worst reasoning why Alt market will not be bounce back at the position where it was before all this mess is
Most project dump their whole supply in market on its investors.
Are you talking about projects who exit scammed? If not, can you name some of these "most projects" that dumped their whole supply? AFAIK, a good portions of premined tokens of most projects are still locked up.