13. The rangers have never fished with us; they just want to help ourselves get our quota.

Rewrite:

13. The rangers have never fished with us; they just want to help us get our quota.

Why?

"Ourselves" is inappropriate here because it doesn't relate back to "they", which is the subject of the second independent clause. It might seem that ourselves is relating back to "us" in the previous independent clause, however, the previous noun that a reflexive pronoun refers back to must be in the same independent clause; therefore,"ourselves" can't relate back to "us".