They obviously set out to make this anime aimed at those who played the game which they just did that. So if you aren't a fan of kancolle this anime is not for you, simply because the anime is targeted at those who are interested/ playing the game and not for casual anime viewers.
Now should you watch Kancolle? The answer is simple,if you are one of the people who are playing the game, this might be for you. However If you are here looking for some good anime, with good plot, good character development and awesome story. Unfortunately, this is not for you. Simply because the story literally has no plot, just like in the game, where the girls keeps on going to do operations after one another and capture new islands.
As the story goes on there will probably be alot of new ships being introduced to us, now if you haven't played the game at all you will probably have no clue who those Kanmusus are. there won't be any major character development since the game itself has over a hundred ships, with a variety of classes etc.
This anime is based on real life WW2 ships, with some ships involved in warcrimes during WW2. This time Japan and Germany (Germany is in the game) are like the good guys who fight against the Aliens to protect humanity. Now where did the Americans go? Perhaps they all end up being the abyssal fleet since all the battle that took place especially events are based on IJN vs USN. Don't take it too offensive though.
the anime could have been better unfortunately it did not meet many people's expectation therefore as a result is a failure in many people's eyes.
Conclusion: I would not recommend this anime to those who have never played the game before/ have no interest
