http://www.worldoflogs.com/reports/b...?s=6995&e=7490 did you seriously only use arcane shot 5 times?
http://www.worldoflogs.com/reports/b...6/?s=371&e=757 You used arcane shot 22 times on a 6:26 kill with 92% active time.
http://worldoflogs.com/reports/rt-pt...?s=1500&e=1903 I used arcane shot 99 times on a 6:43 kill with 94% active time.
You're just straight up not any good, they are not elitist at all to decline you. If you are on trial to a guild you should be playing your class properly. I'm not sure how you could "use arcane shot less to get more kill commands" since kill command has a 6 second cooldown and is ALWAYS used on cooldown.
If I look into that Zor'lok kill of yours I linked, you only used Kill Command every 10.2 seconds on average, also your pet for some reason only had a 75% active time. Since you were apparently using Arcane Shot less to get more Kill Commands then you did not do a very good job of that.
If you look at the log of mine I linked of Tsulong, you will see that while having 99 Arcane Shots in a similar time frame as you did 22, I also used Kill Command every 8 seconds on average, which was honestly not very good and is usually closer to 6.3.
The guild was right to decline you, a simple look through all of your logs I can find on WoW-Heroes tells me you are not a good player at all and have no idea what you're doing.