I've played this game since it was released, I guess thats almost 8 years now. I havent played non stop of course, infact in those 8 years I've only amassed 6k games. I still get normally around 40k attack in my bb5 because Im just not very good at being aware of my surroundings. Maybe one in every 10 games I'll get 100k+ (Although honestly my supports on my Soyuz arent very good and it's pretty slow, games where my team dominates normally means Im stuck at the back without the opportunity to shoot anything.) When I got my first bb4 I think 75% of my games attack was about 35k, equal to one good salvo, and then Id get sunk :) but that was my first ever BB like that and it takes alot of getting used to the bigger ships I believe.
You could try another route to mix things up a bit, roll a CV or SS crew, your BB crew will always be there to play when you want. Just dont give up, this game demands alot of practise and patience. If you're making mistakes right now, the most important thing is to learn from them. Ancient chinese proverb that, fail to correct a mistake and you've already made a second mistake, something like that. Infact, thats actually about righting what is wrong but I think you get my point. Even when you do badly, you improve as long as you learn frorm it. When you do well, you prove to yourself youve improved.
Don't give up, there are plenty of players who will help you if you feel that's what you need. I believe there are more of them than those that would demean you. But you can always get better at this game, but don't forget to just enjoy the game too :)