Having made a mythic myself, and reading over this thread. I can't help but wonder, when you go to do Assaults, do you take the time to read up on how to clear them before you attempt it?
With limited attempts (1 tag per 24 hours, with a max of 4/5 tags a cycle) you should be aiming to reduce the difficulty of each Assault mission at hand. There's truly only a few that are 'unsoloable', with Lebros Supplies being the only one that is truly impossible alone.
Armed with such knowledge in advance, it shouldn't be hard to know on which Assaults you need to shout for help, and which you can simply go in and clear by yourself. This would largely expedite the process, as well as have you shouting for the ones that often other mythic makers would be stuck on as well, furthering the odds of you receiving assistance for known difficult Assault clears.
Certainly would do a lot more for your time than complaining on the forums I'd think.