i get it...lived it...but don't give up.
Like you, I was the best at what I did...I helped everyone..I worked copius amounts of hours trying to do my best to help the company...and when the picture was clear to me that it wasn't ME they had in mind to "develop".

That I was just a "worker bee"...I became infuriated. I quit...I made 100k a year.

But, I couldn't take the rejection I was feeling.

Don't let them win...they win if you do what I did...left the job..felt worthless.and went on sSDI for anxiety, substance abuse and depression.

Get another job...and just always strive for more..don't give up.