<human>: Can you condense the text into a few key points?

Basically after working a trial shift at a popular coffee chain I was rejected. Of course i wanted to know why, so i asked.

She replied with something along the lines of 'lack of presence, in n these times you could have asked if anything needed filling' and 'lack of confidence when approached by customers'

first of all i need to say the above is bullshit. i was out back 90% of the time washing up and when i wasnt out back i was clearing tables and wiping them. it was a very busy day so i was doing this continuously. so freaking excuse me if there was a lack of presence, i was hard at work out back and around! what do you want me to do! and the rare times i waited a couple of minutes for some more tables to finish, i disctintly remember asking if there was anything else i could help with, even at one point asking to help with a delivery. 

the same applies to customers approaching me, idk, maybe no customers approached me BECAUSE I WAS SO BUSY OUT BACK? but thats not the only thing, /I/ approached customers! i held solid conversations and small talk with them! no problems at all! 

so i think these 'problems' that clearly werent problems, is just her polite way of saying i didn't talk to the staff members enough.
but that's so unfair it pisses me off. how do you expect me to show you my personality and be talkative when i'm so busy and you have given me the busy task.

this makes me feel extremely cheated because i thought i did really well when they told me i was the only one that did a lot of work on their trial. now i realise i would have been better off having hardly any work like the others, cause i could have talked with the colleagues and maybe attempt to get them to like me. like the ones who got the job probably did. i hope those people fail and the lose the job when they realise they cant cope with a busy atmosphere. sorry but i do.

this is probably a petit first world problem but god am i so fucking frustrated with this. it is so unfair.
<bot>: was busy on my work trial and this gave me a disadvantage becuase i couldnt talk to my colleagues and show them my personality