Roads get muddy, just like in the winter they get icy. The Highways Agency can only do so much, so it is down to us motorists to make sure we are attentive when driving.
I'm not sure how many other vehicles managed to negotiate the mud without crashing before or after you, but it sounds like you made a mistake and are looking for someone to blame so that you don't end up paying for it. Please forgive me if I've got this all wrong.