Collins votes with Trump 68% of the time. Better than zero if the leftist Gideon gets in.
Yes. She is a disappointment to be sure to conservatives. But, in this cycle the senate is on the line and the dems actually think they can take it.
If they do then no more conservative judicial appointments. So her seat is gold to us. And to be fair to her (and I personally think she is a simpleton) her state would never elect a strong conservative.
So as you say she is better than the alternative and more importantly her being re-elected may save our control of the senate.