http://whirtorrgetftvz4g466sjqkegtyi35bjl4bvotfkfossunf5my4x6ad.onion/blog/tornado-cash
A tool just like a phone, car or internet in the essence that it does not inherently do anything good or bad, right or wrong. It only provides services that the users can exploit in any way they want. Thus, it cannot be stated overall whether this tool is good or bad.