Help please

Well, I'm back. Some of you will remember me as the annoying person who's always asking breaststroke questions. Well, I've decided to take everyone's advice and work a bit, so I haven't logged on or asked any questions for a long time. But everything is not getting better. At all. Remember how I used to say my time stays at 20sec per 25M ? Well right now it is still 20 sec per 25M. After 7 months since I got that time and decided to better it, it is staying at 20sec. My 50M time used to be 41 sec but today, 7 months later, I decided to time it again and it's now 43 sec. I'm beyond frustrated. For 7 months I've been devoting 1 and half hour each day to swimming. I've been doing drills, technique training, doing 20x25s ono the 1 min for the past month, and now, my times have gotten worse. I know people who barely swim once a month who can swim faster than me and reach a 41sec 50M breaststroke. And I also know some people who improve lightning fast. But it is just me that's working hard and not improving. This is really taking all of my motivation and confidence away. I'm beginning to dislike the water now. Please help me. Why CAN'T I IMPROVE? WHAT am I doing WRONG or NOT DOING? Am I just too untalented to swim at a moderately fast speed (my goal time has always been 35s per 50m)?? Thanks.