I don’t know if you are of below average intelligence and learning or not (I tend to think not), but even if you are way above average, you are still nowhere near the Chofetz Chaim and can not disagree with the Chofetz Chaim. I do not think there is anyone in this generation who can disagree with the Chofetz Chaim. I don’t think the Gedolei Hador would disagree with him.
If you are finding something he wrote hard to accept, I would take Lakewood Maidel’s advice and discuss it with a Rav, since as she wrote so wisely, it might not mean what it sounds like, or he may be able to explain it in a way that is easier to accept.
If you are still having trouble accepting it, then:
Realize that the Chofetz Chaim is way greater than you are and the fact that you can’t understand something does not take away from its truth. If we were capable of judging and determining which teachings of the Chofetz Chaim are true, then we wouldn’t need the Chofetz Chaim. What makes the Chofetz Chaim the Chofetz Chaim is the fact that he is way above us.
When I find that there is some idea that I have a hard time accepting, I just tell myself that it must be emes because it is from _____, but maybe it is something that I can’t really relate to at this stage in my life, so I try not to think about it too much (assuming it’s not something that I have an obligation to put into practice). If it’s not something that you have to deal with, why think about it when there are so many other aspects of Torah?
Accept your limitations and move on.