I think people fall into one of three categories here:
I fall into the last category, but I admit to being an optimist in nearly all things.
In my opinion, people like you are entitled to be skeptical based on the evidence we have seen and the prosecutions to date, but...I don't fall into that category. I keep in mind that Watergate took two years, and it was pretty straightforward then, and they didn't impeach him. If they did, it would have taken another year or so past that to reach the end of it.
I don't think any less of people for being pessimistic, I am just not there yet. If you can't find hope, don't sweat it...I will take up the slack for you in that respect...:)
Myself? Some days I'm 60/40 and other days I'm 40/60 that Barr will do the job.
With Sessions of course and his recusal, I was 99.999% sure that he was afraid of the Deep State and that he wouldn't do the job.