As someone who has worked with ETH, I tend to disagree. If there are issues with Ethereum, they mostly stem from it being ahead of other blockchains in terms of features. With that I mean that other blockchains don't have these issues because they don't offer the features in the first place.

Is it then a good idea to have these features at all if they introduce new risks? I believe so, they enable many interesting projects that are hard to develop on other blockchains. The growth of Ethereum is an attestation to this. As a consequence, many skilled developers are now creating solutions to the (relatively minor) remaining issues.

For bigger issues, like privacy and scalability, no-one has a good answer yet. The Ethereum community is working on promising solutions (Casper, Plasma, zkSNARKs, eWasm).