I don't understand how rating works either. Sometimes the number of episode does determine ratings but it doesn't apply to all. Salub Rahut Ruk I didn't even watch. Quality is not so great! And not really a fan of Thai action drama, most of them are corny- no offense. It's going to take them a few more years to catch up with the Chinese and Korean. Thai action movies are good though, but not the serial/lakorn ones lol...
I thought Ken had potential from his works before Oum Ruk. But like you mention it was Oum Ruk that brought him to fame. I know some people didn't like it, but the majority did. As much as I love Ken, I don't think he could hold his positon that long.
The ending was corny. It ended just like SSJ, a cliff hanger. I liked the ending of episode 13, where Turd broke down in tears. That was a touching scene and then episode 14 kind of killed everything. It was fun watching it played out. So many flashback and STABBING like some had mentioned lol... It was an okay drama because of Rita lol...