Almost every single one of those things can be applied to both the internet and the traditional finance system. The biggest money launderers are banks. Bitcoin uses less electricity than the global finance sector (let it be known I do think it is wasteful, Proof of Stake is better). More scams still happen through banking and web 2. Crypto is an extremely small market for money laundering compared to other methods. While not pump and dump scams, the financial gatekeeping done by traditional finance to only give access to high yielding investment opportunities to accredited investors is just another way of keeping the rich rich.

As far as I can tell, crypto is no more cancerous than existing systems. It's just that all you see out of crypto as an outsider is all the bad stuff because anything creating real value is too heads down building to make a fuss or too complex for the average joe to comprehend yet.