Last wet season around January I was flying a single engine inbound to Darwin and due to storms had to stay at 9500 till almost overhead Darwin and then descend. They wanted me to track differently but I told them that I cannot due weather and this is the only track and alt I can follow. They let me do it but after landing they talked to me and told me I should not have done so because ifr traffic had to be put on hold and they told casa , who later had a word with me and said I should have done something else etc. My only option that day was to descend below the weather 75 miles out and should have but chose to get a bit closer to Darwin and find some wholes but took me all the way to Darwin to find a descent one.