This blog post from a few years ago suggests that using BitTorrent services over Tor is a bad idea for multiple reasons. However, it also suggests some fixes to get over these problems.
Is using a
It doesn't make you anonymous. Torrent protocol wasn't designed with anonymity in mind and there are a million ways you're going to leak your actual IP address.
Tor is a TCP only network.
While this doesn't give you the anonymity you wanted, it will hurt the network for other users.
Just found out about i2p, i2psnark worked with i2p torrent (I couldn't make qbitorrent work). If I understood corectly, it should work with non i2p torrent if someone on the i2p network has it, but it's still pretty niche so right now it doesn't work mist of the time.