Ruining game experience

[Anapingofness]

Getting a kb will help you immensely.
That being said, nobody can force you to not watch CS. You have just as much right to watch those CS as the people who choose to skip them.
If you like the storyline then I strongly suggest you watch the CS.
A little bit of communication goes a long way. So as long as you are kind people will usually respond positively.

One thing that can help you get the runs that you want is setting up your own group through party finder.
However, if you queue up in Duty Finder then the experienced players should be aware that not everyone wants to skip CS or speed run. It is courteous for them, who have already cleared that content, to be kind and let you experience it as it happens. Watching CS later in the inn is a cop out used by impatient players.

Also if people just happen to be massive jerks, report them for harassment and, if the situation is bad enough, leave.