I realize that this is similar to other questions, but this isn't the same.
This new guy just joined my gym, and was already a purple belt when he joined. Since I always try to roll with everyone at some point, I give him a try. I was expecting that since he was a higher belt than me, he would easily submit me. But instead I was able to submit him something like five times withing a five minute period. This seemed a bit strange to me, seeing that he had about three times more experience than me.
About a week later, I rolled with him again. This time he still didn't put any effort, but actually coached me through my technique, which I am still sure I was doing correctly in the first place. This annoyed me, since this is specifically against rolling etiquette. It seems to me that he was sending me the "you aren't good at Jiu Jitsu, so I won't try in order to give you an advantage" message, since he didn't seem to be trying to even consolidate any positions. In fact, it was more like rolling with a sock than a person. How do I deal with people like this?