Very slow BT download speed compared to other BT clients

Hi,

As the title says, i'm experiencing a slow torrent download speed vs any other standard torrent client (utorrent, transmission, etc.).

I'm new to aria2 (as a daemon for torrent), so, i'm not sure if i'm missing some settings or similar.

My current config (torrent part) is:

enable-dht=true
enable-dht6=true
bt-max-peers=128

Any help is more than welcome!