The issues with taking counts on forums and such is that we don't know how much of the trailer tire business each manufacturer has. If Maxxis has 75% of the business, it would stand to reason that they would have more incidents occur because more of their tires are on the road.
If we knew production data of the various brands, and then could get a count of issues, that would be a better way for us to know the percentage of failures.
Myself, I put several thousand miles on my old trailer with maxxis with zero issues. Just put a set on my new trailer and expect the same. I personally know of a set with over 80,000 on a car hauler. Trouble free. I have 100% confidence in my Maxxis STs.