Seriously, step away from your obvious passion about this issue and think about it. Career civil servants cannot be reasonably expected not to have political opinions. They ARE expected to firewall them from the discharge of their duties. Like I mentioned earlier, political affiliations and donations are not allowed to be considered in hiring or promotion...this is precisely to AVOID stacking civil service positions with people whom you know are wearing your jersey.
I'm just not sure what your pretzel logic is suggesting. That Mueller should have vetted his team for private political opinions? That he should have preferentially hired Trump supporters? I don't see how either of those things would be better. I think it's fair to ask where legitimate conflicts of interest may exist, but per DoJ guidelines, political donations are not considered a conflict. So, to answer your question in a short sentence: yes, I absolutely do.
So what you know is that Peter Strzok doesn't like Trump. Ok. What you don't know and are only rabidly speculating about is how, exactly, his personal political bias affected the investigation. What I see is a whole lot of hand-waving and a reluctance to confront the fact that one guy with a political opinion didn't fabricate this entire thing.