Private torrent sites are the best. Sorry but I cannot give such details publicly on this forum. But some private torrent sites are fussy about which clients and versions you use, because they revolve around users keeping a decent share ratio and other torrent clients do not behave properly with such trackers.
Otherwise for public torrents, google can be your friend there.

As for using the Gnutella network, it's a learning experience. Unless you learn how to avoid the bad files then yes, you will have issues. And of course learn how to find what you are looking for.