How to fix color/ quality loss when exporting raw images from Lightroom to Jpegs?

I recently noticed that some of my images started exporting more dull in color and less sharp than they appear on the screen.  i have talked to another photographer who experienced the same thing and they mentioned I need to change something regarding the color. I have tried exporting with other color settings like sRGB and such but I haven't seen a difference. I am wondering what else there is for me to be changing so that this can be fixed.  The image on the left is from my screen, and the image on the right is after being exported.