The mere fact that you can't play a single God damn round of crucible or run through a strike because you receive a flood of bullshit error codes only found in this game. I have never had a problem with cod or warframe or any game except this one. It's a good game just fix this shit.
And if you intend to pursue your ten year plan with this game I suggest you fix this one before your fan base is gone.
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Games can always have errors like this. Call of Duty: Ghosts would have hours on end where you couldn't fetch your profile when it first came out. Yes it sucks, but it'll be fixed soon enough.