I think your English gives you character. It's unique. You wouldn't be the same without it. Better not to be eloquent but to be a man of God on fire for God and to be saying something that is true and beneficial to others, in any dialect---to be imparting heart-knowledge and wisdom from the Spirit of God to others---than to have the grammar of an English professor and a lot of head knowledge or worldly "wisdom" that does nothing for the people spiritually.
Frienduff, you are clearly a very smart person that doesn't care how he is viewed by the academic types. The crazy writing style can't hide that. I have no doubt you could write very eloquently if you want to, but you feel it gives you an advantage being underestimated because of how you choose to write. No matter how you choose to write, be faithful to exhort and to warn. Those meant to receive it will receive it.