How does the narrator feel about Ollendorf?

Twain finds Ollendorf to be a less than desireable companion. He is nervous, slightly erratic, and doesn't take instruction. In addition, when Ollendorf gives instruction (directions), he takes the group in circles.

We warned Ollendorff to keep his wits about him and handle himself carefully, but it was useless; the moment the bow touched the bank, he made a spring and the canoe whirled upside down in ten-foot water.

_______________________________________________

Then the old man waxed wroth and abusive. He called Ollendorff all manner of hard names--said he never saw such a lurid fool as he was, and ended with the peculiarly venomous opinion that he "did not know as much as a logarythm!"
We certainly had been following our own tracks. Ollendorff and his "mental compass" were in disgrace from that moment.