This could have been my own Dd all through School & nursery - actually initially at times it was, but instead of feeling frustrated for her & secretly agreeing with her grumpiness at being paired up with & therefore helping less able DCs, I encouraged her to engage with them & actually help them.
Which IMHO is exactly what you should be doing for your own DD too - you say she's not patient - then she needs to learn how to be - the exchange set up by the teacher enables BOTH DCs to learn something valuable - for your DD, that would be patience AND kindness
Lets face it, she may be clever & able now, but who is to say how she will be when the others catch up - early years are difficult because ability varies so much, but you will find that many of the less able DCs are just less mature & WILL catch up - this could well leave your own DD flagging behind - what then when SHE needs this extra peer help -- will you feel equally frustrated for her that she's not getting it ???
My own DD is now still way ahead & I'm always very proud to see her school reports & the comments on how clever & hard working she is - but what really makes my heart full to bursting, is the comments on how kind & helpful she is to others - it hasn't held her back at all - just made her a much more rounded & lovely human being :)
Do yourself & your DD a favour - instead of complaining - see it as an opportunity to teach her how to be a more caring, more rounded less selfish human being
if she's still as able in years to come, the School will have G&T strategies in place to help keep her engaged anyway