That's the bad news about ICO most of them are failed projects. But, don't get discourage of the news. You can continue investing, but the caution. Apply the necessary procedure in looking for good projects. As you said there are still 10% that are good investments. They might not offer very high returns but at least they are good.
I think that is a good thing. If all investors start to analyze and invest only in good projects, then these same 10% is not bad to rise and in the shortest possible time will reach the level of Ethereum.