I have never done any Goenka retreats, but maybe another experiance may go someway to give a context/perspective of 'anoyance' of it?
Repetition is common in my experience, sure the exact same talks would/could grind a nerve or two, but there is benefit in it, particularly in this instance.
it gives time to capture the whole of the context/nuances of meaning, many teachers say the same thing over and over again, it is common, they only teach one thing, and may use different ways to do this, and this has its benefit, but Goenka naturally can not be everywhere at once, so the recordings are used.
the plus side is that you can hear what is being said in a new light, with further experience, and hopefully a more refined sense of the practice.
I heard of one person hearing a sutta being read out, it said
(it is in Ud2.10 I think??in the seen there is only the seen
but he understood
completely misunderstanding it, but he did have quite an interesting insight.in the scene there is only the scene
there is also a practice which I engage in from the christian tradition known as lecio devinia (spelling??) or devine reading, and I gleam new information on every reading of a text over the space of a week or month that I am using a text. the repetition can be an object for watching both the mind and strengthaning Satisampajana, mindfulness & clear knowing, just the same way as watching the breath is. and as you have to hear the same thing in two languages there may be a nuance in a word not in the other which could be good to explore.
The Chanting can be dull (I dislike the morning chanting myself as it is a short version of the evening chanting, although I preferred the alternative version for the morning) and one can think of many ways to escape the repetition of saying something particularly if you don't understand it, but one can also look at the meaning of what is being said and focus on what the meaning means to you, like what is it to be the perfectly enlightened one, who actually are the sangha to me, or who is my sangha, and why is the Dhamma complete in the Beginning middle & end/how is it practised rightly? [edit = also chanting can help with breathing, as in the long and short breath of the anapana practice instructions found within the suttas, and chanting has its own tradition, mantra recitation, or mantra yoga, and even the nada yoga, or sound of silence found in other Buddhist circles & also taught by Ajahn Sumedho is related to this.
but from a textual point of view the section of the Satipatthana sutta known as clear knowing (after the posture section) is directly part of the practice you have had discomfort with.
Like I said I have not done a goenka retreat, and know people here and elsewhere have benefited from them, but there is a way of attending anything which can make it beneficial or not.
Hope this Helps