On the technology side, I can not say much, but it is a currency developed from scratch and I did not find someone with knowledge who said that his proposal is garbage or something like that.
The good and informed criticism against this currency does not go against the intellectual capacity of the developers, their block technology or their project or route map.
The informed criticism that I found, not the superficial speculations that many who feel "experts" usually do, are addressed to questions of ethics, not the ability, especially the Ex-EoC of ETC that is behind this currency and some of the organizational practices that question whether this currency really seeks the benefit of investors or only the developers who would centralize the currency at their convenience.
But of that type of criticism nor the Bitcoin, now in hand of the "Core" escapes.
Be faster to get informed, slower to think and very careful to invest
We all want to clarify doubts and we do not need people who only stir the water and manage to make it more cloudy
Sorry for my English
In summary, you are telling that cardano can do nothing against bitcoin right? But let me give my opinion, the benefits and full potential of a coin doesn't rely on what it is. But to those who are using it and hyping it. If cardano's creator is doing much job than expected in order to market people, there will be an uprising of its market price.