You can't expect feedback - the could have 1000 applications, no company has the manpower to provide feedback. Some barely give feedback at the interview stage.
You just have to get used to it! It's an employers market right now.
Before they used to look for potential in a candidate that they would invest in, now they want someone who can walk in and do the job.
Sorry about your rejections but you need to accept that it's how things work.