I find that bothy bags follow the same principles of life rafts - a “2-man (person?)” version is very uncomfortable if you try to fill it to capacity. And the longer you have to endure other people’s company, the more uncomfortable it gets! Having said that, fortunately I have never been in a true survival situation on the hill (or at sea) - I’m sure I would be more grateful under those circumstances!
I carry a 2-man bothy as an emergency shelter. I have used it once by myself and it’s ok - warm and dry, but noisy (in the wind) and cramped. I have used a 4-man with a friend and my back started to hurt and my legs got cramp. We managed to share it with a 3rd colleague for a while and that was even more cosy.
Leading the antenna wire under the bothy to your radio is not an issue and the longer you sit there, the more other distractions you will find to take your mind off such fripperies 