Well, everyone else has given an idea about why you shouldn't go to Berlin.
In case you have a powerful reason for still going there, a few quick points: English is not that common, but is far more common than in the neighboring cities - you probably won't be super comfortable, but you'll survive. If you are on a budget and/or planning to live on whatever money you already have, Berlin is much cheaper than any of the other countries mentioned. There's also a very large Turkish community, in case that means something for you.
Keep in mind all the negative comments mentioned, though. This points are valid when you are a regular citizen, but as a refugee they might not apply.
In case you have a powerful reason for still going there, a few quick points: English is not that common, but is far more common than in the neighboring cities - you probably won't be super comfortable, but you'll survive. If you are on a budget and/or planning to live on whatever money you already have, Berlin is much cheaper than any of the other countries mentioned. There's also a very large Turkish community, in case that means something for you.
Keep in mind all the negative comments mentioned, though. This points are valid when you are a regular citizen, but as a refugee they might not apply.