you do not need to use the app to download from mega.
just visit the link in your web browser, select the file you want, and then click down load up the top.
the free/no-app download from mega can be pretty quick when the file is under 5gb, like this is so far
are you using some kind of device that is designed for telephoning your mother on a sunday night?or are you using a device designed to play "computer" games?
even if its some kinda weird computer, cause is given to you right there - not using the right tool for the job. get a better browser, one that is capable of doing the job you require of it.
sounds like user error to me.