Hello. Having to wait 15 minutes to upload 300MB is not a real problem.
I recommend that you use different tabs in your browser while uploading games, that way you can continue doing things while you wait for those horrible 15 minutes.
Another option is to use buttler, with a simple .bat you can automate the upload and leave it in the background, while you take advantage of going for a walk, buying a coffee or reading a book, there are many useful things you can do while your computer uploads those MB.
Now, if for some reason, it is impossible for you to divert your attention and do any other task and you have to pay attention to how the upload bar goes up, you may have some type of disorder that it would be better to discuss with a specialist.
If you really want to know if there is some kind of problem with the upload servers, it is best to ask or report it to support, but I advise you to try to be less hostile and ask the question in a way that sounds more polite and less like a huff.
Luck.