No, you cannot end your stream early.
Ending your stream early means that you end your stream before viewers can see the final results of the game since your stream is delayed. A good rule of thumb is to keep streaming for 5 minutes after the match.
Streams ending early can hinder stakers trust on the final results on the match and partners competitive integrity.
This will include matches with a delay
If you end your stream early - you will receive a 2 point strikes on your account with a 60 day reset period. After 3 of these, you will go into partner review.