The question is why do some people generalize all Altcoins as bad? considering there are over 3000 of them out there. One would not have the time to go through each project one by one. to analyze the project. team etc everything behind each crypto project.
There has to be some project out there under good intentions. Not all projects could be a scam. I admit I only have a top 4 i consider when it comes to best coins. But yet many should be decent at least honest projects out there. Afterall we do need more projects. more quality projects out there in order for crypto to succeed.

your thoughts

Perhaps an assumption
People literally believe that once 80% are bad all are bad which is not really the blockchain idea

As an investor you need to identify the break and boom limit of every token or altcoin you invest in

No, not all coins are scams but who knows what the devs' real intentions are?  I have always assumed that they usually create coins or tokens so that they can get rich, and in 2017 it seemed like everyone and his brother was cashing in on the hot ico market. 

You mentioned that there were over 3000 coins on the market, and I would suggest that's *far* too many.  If you pick a random coin out of the coin population and compare it to another random coin and then ask yourself how the two are different, you'll probably be unable to answer the question.  That's because so many of them are just clones of something else, slapped with a new brand name and marketed to people who don't know any better.  It's sad that some people buy into that hype and become bagholders while the coin devs are laughing all the way to the bank.

"Pointless" is probably the best term to describe the overwhelming majority of altcoins on the market.

hmmm well people say so many things on the internet, if you want to find a reason and explain everything you'll go nuts.
moreover there are people who say it just because they get paid to say that or because they lost a lot of money or hold bitcoin right now and will be pro altcoins when they sell bitcoin.. so... make you own research and decide your own opinion.

its your money dont let others people opinion to affect your decisions before you think about it from every angle.

Yes you are very right and i fully agree with your point there are dozens of good altcoins the things go wrong when people start analyzing the project or alt with respect to their price where they just donot realize that price in the open market is a variable of multiple complex factors which cannot simply make us say that it is scam or failed altcoin.

We've now got more than 3500+ altcoins. Everyday this number keep on increasing. If you go through every new altcoins listed there'll be features and promotions that state it to be better than bitcoin and other top altcoins. Here we can't say only 20 has got potential, more altcoins are good but it is hard to find. Maybe the luck gets us to find it, and everything getting tokenized is the reason for for the existence of such a large number of altcoins.

People can generalise whatever they want.   There is a game theory that tells us that everything gravitate to one center. Like we gravitate to earth. So does Moon. Because Earth is bigger then us and Moon. But they simply not see that there are more use cases for block chain. Right now we have a lot transparent ledger payment coins. That will not last. I mean they will exist but will have 0.00001% of Bitcoins marketcap. Same as wil happen with normal cryptocurrencies. There will be some, but will have 0.0000001% marketcap of Monero.

Not many people hate on all altcoins, but common argument is that most altcoins are obsolete, not needed, problems that they are solving could be solved without special dedicated cryptocurrency. For example fast transactions with low fees can he solved using bitcoin and Lightning Network. So we already have this feature in bitcoin. And there are more so-called Layer 2 solutions around bitcoin, shown on this graphics:



Source: https://medium.com/digitalassetresearch/a-look-at-innovation-in-bitcoins-technology-stack-7edf877eab14

They are actually wrong and they are just creating FUD's that will make newcomers will think negative about crypto. It absolutely they are frustrated enough to say and look the market full of scam, besides we could still find good project and altcoins that can still be trusted.
The market isn't so hard to understand but somehow some people wouldn't open up their mind instead of being blinded enough to see the reality. 

it caused some people were getting a bad experience with icos and that happened so many times. That's why some people may call all of the altcoins are bad coins.
But this is for a coin that created through use ico as a way to raise the funds but if that has already created through use the normal development progress without done an ico and they will call that's a normal thing when happened with a coin that the creation without using the funds.

But i just take this as their opinions. now, they are blaming or generalize the bad altcoins based on the reputation of the altcoin itself. Maybe, there are some still saying all altcoins are bad but that's not a problem as long as we cna still do our judgment based on the fact.