I think I am grasping what TS means.
You are excited watching the fight because it is a big fight for a chamionship. You stay on the edge of your seat because you are waiting for something big to happen. You know both fighters have KO power and it can happen at any moment.
It was boring because nothing really ever did happen except maybe the last minute of the fight.
If two fighters you have never heard of went in there and had the exact same fight, you would call it boring. There are lots of big fights like this. IMO, the way to tell if it's a good fight is you want to watch it a 2nd time and actually enjoy it when you do.