My rabbit died today of fly strike, was it my fault?

this morning i checked my rabbit as i usually do and when i go up to his hutch he usually comes up to the front and gets really excited, ecxept he didn't he was laying at the front not moving, still breathing but not responding to much. my sisters partner came out and started stroking him trying to get him to repond and he tried licking him like he usually does (lovely personality) but couldnt and then tried moving but looked like he couldnt move his back-end very well and was very wet, so he picked him up and he had maggots on a wound near his bottom (none that we had noticed he had). We called the vets and they said it sounds like fly strike and to go there asap, which we did. When we got there the vet said it was very bad and could of happened over the past 24hrs and happends very quickly, he had 2 wounds on him - one covered in maggots and another was a whole, he was very poorly. she told me i had 2 choices, one to put him to sleep and the other they could remove the maggots and give him medication and would be a few months of being at the vets but would only be a 20% change he's pull through and fight it .. i just couldnt put him through anymore pain and discomfort, so i choose to have him put to sleep and to take him home to be buried. i cant help thinking it was all my fault, he always had a clean hutch, i just brought him a new one about 2 months ago and was loved sooo much! i miss him so much already and want to know if he was in any pain, he was fine when i went to see him yesterday, seemed like it happened over night. my family want to get me another rabbit tomorrow to help me to more on etc but i cant help but think it was my fault he died and the same will happen again, i love my rabbit so much, i cant stop crying i jus want it to be a dream!!!!!!!!!