Czar correct me if I miss something or get something wrong.
I don't really get where First to 11; 21 round limit is confusing. I have played in TWL and done a little math in my day so I understand this perfectly well. If you are confused as to what a round is, then look it up. We have already said that teams will take turns playing on each side of the map.
If you are still confused the rules state 1:45 Per Round (note the use of Round)... those who like server configs, that would be mp_roundtime 1.45. One round is one spawn, one buy period, on one side of the map. (that means that in 1 round you will either be a Terrorist or Counter-Terrorist and not both)
I can understand people will have different preferences in the counts and start values. I have played in tournaments with a wide range of settings in these areas, and I find the variety refreshing. It can bring even more challenge in strategy for starting kit in the tournaments.
In terms of the # of rounds, keep in mind that CSS is not the only tournament and not the only activity scheduled for the event so time can be a factor in scheduling. There are a lot of moving parts to make sure as many people have as many participation opportunities as possible to maximize fun. So maximize the fun and enjoy every moment of the tournaments. I have seen and participated in this tournament format many times over the years and the tournaments have been fun, fulfilling, and exciting while still allowing me to play in multiple tournaments without being forced to pick which game i wanted to play over the other.