I'm not. Naturally he wasted many opportunites and made many blunders but the reason IMHO he is still over the wire is the extreme resentment his non-PiS backers feel towards the ruling establishment and PO in particular
My feeling on the matter is that they will shift to PiS on election day, or they won't go to vote (especially if the weather is bad) - it just doesn't seem credible that he can attract any significant support with the random collection of individuals that he has.
I do not believe all those parties will get in. There's a good chance that ZL, PSL and Korwin will not. And that will enhance the chances of PiS going it alone.
The thing is that PiS aren't doomed to fail automatically with a minority government. There are numerous examples of successful minority governments - for instance, the 2007-2011 Scottish Government worked well because the ruling party proposed good, sensible legislation - and it was politically impossible for the 2nd biggest party to oppose it, even though they were furious with the situation. In such a scenario however, it would be vital to keep Kaczyński and Macierewicz out of front line politics.
But PiS also have to be careful now. I've seen some nonsense that they're proposing to get rid of the Bologna Agreement in higher education - this essentially means that a Polish degree is the same as a German one which in turn is the same as an Italian one and so on. Such proposals won't help - the average person that cares about Bologna is not going to support abolishing it.