Considering how many times I hear folks' saying that World of Warships is "pay-to-win", it's always a surprise to me to hear the opposite. It sounds like you are frustrated that, despite your input over the years, the results in your WR have remained the same. As someone who was once very bad at the game, who then became someone very good at the game, the most effective way to get better is to division with those who are better than you and to watch instructional videos from veteran players.
YouTubers like Potato_Quality are easy to understand and make videos that are accessible to a wide audience. I recommend giving him a try! He's on of our NA CC's!