Not all ICOs are the same. It's not quite right to generalize in this case: it is scam ICO that ruin ICO's reputation, not just any ICO.
On the other hand, the market is extremely bloated with hundreds of ICO coins being listed on different exchanges. It may be confusing for investors and traders, but I can`t say it`s only negative: current environment is the natural selection of coins, where only the strongest can withstand.