To expand on what Mark said,
1/Turn off the date/time stamp, it serves no purpose these days apart from spoiling what may be an outstanding image. The date/time data is available in the EXIF data for each image in any case.
2/Take your time, most of these images seem to have been taken over a very short timeframe, slow down!
3/ Composition, many of these images are poorly framed, cutting off parts of planes especially nose & tails rarely adds to the value of a photo.
4/ Lighting some of these are back lit (sun behind the aircraft), rarely does this help.
If your camera sends text messages, that could explain why your photos are rubbish!