slow first 200m of season

The thing is I always lead till 150 then flat out die and drop off bad. All of these runs I led 21.8 guys till 140-150 then they just fly by me and keep pulling away and I end up in 22.6 all within 50 meters distance. I might run one more 200m in a week then I’m through for the season. I will try going out 95% through 50 and then 100% the rest of the way and see what time I can get.