Hi Ife - I would watch both my composition and my post-processing. On the first image, you are facing a problem where two individuals (dressed in white) are up against a bright sky background which does not work well at all.
A tighter crop with just the background of the stage cleans up things a bit in addition to working on the exposure, vibrance, clarity and black values gives the shot a bit more "pop", but it is still not a great image. At a second level, I would just get in for a tighter crop.
A similar issue on the second image; too much stuff that does not add to the image, but a tight crops focuses in on the subject.