a) We always expect a big hit and don't trade according plan.
b) Many strong projects are effected due to shitcoins performance.
c) Altcoin will still remain dead due to Bitcoin's FOMO
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.
When a project have nothing to offer why would investors still get involved with it? When a project losts track of their vision why would Investors still associates with it? When a project still finds it hard expanding their services and growth why would investors associate with it? When a project is affected by all these why getting involved when there are better options. In my own opinion I tend to deviate a little from your list because even when Bitcoin is growing in price there are altcoins also doing that with it. Bear market affects all coins and during this time if a project shows lack of concern investors will move to another which have a good chance of recovering from the bear market, that is why when most will bounce back some won't..