If Q were non-linear, then the Big Bang would not make such a great hiding spot from the other Q. He can travel through time, but he is not omnipotent, omniscient, or omnipresent. He stands no chance against non-linear beings. The Prophets could stop the Q from ever existing in the first place.
His marriage is fine. It's his own trauma that he's running from. That's why he spends his days fixing everything else and his nights playing dress-up and dolls.
Never forget Voyager, where Torres could invent a brand new method of transporter lock and implement it on-the-fly all through a console on the bridge, but even the bio-neural gel packs weren't smart enough to get a power requisition down to the bottom decks without someone putting it into a padd and physically walking it down there.
Clearly if the architects had seen anysci-fiever they would have come up with the idea to shunt that excess energy into ad-hoc shields for poor Ensign Redshirt.
Okay, I didn't expect all of the examples to be from Stargate. But they certainly like that trope.
If Q were non-linear, then the Big Bang would not make such a great hiding spot from the other Q. He can travel through time, but he is not omnipotent, omniscient, or omnipresent. He stands no chance against non-linear beings. The Prophets could stop the Q from ever existing in the first place.