Not seeing not knowing what they are going to do next, yet too easy to figure out.
My guess as to what happened, simple Scientific Cause and Effect, the Discovery "Spore Drive" tied to All Known Space and Burnham's "Red Angel" Suit when sent into the Future caused the Dilithium to become inert, When Burnham detonated the Red Angel Suit Caused "The Burn", as that was the ONLY for Centuries significant Change to All Known Space.
When the ties between the dilithium crystals from Federation Slave Labor Mines was cut, by the Discovery leaving that time and that time's All Known Space, like a Nuclear Reaction without controls the balance and controls no longer existed, the dilithium crystals went inert, then when the Discovery went to the Future the dilithium instantaneously overloaded as a fisson fusion or fusion fission reaction. The Explosion was then triggered by the destruction of the Red Angel Suit. And also almost all Star Fleet Starships are equipped with Nuclear Reaction ION Drives as "Impulse Drives" of controlled nuclear explosions one after another Nuclear explosion to push the Starships.
They Discovery are causing a significant Time Space Problem and Paradox, of "Which came first the Chicken or the Egg", as the past Dilithium that they brought into the Future is now the only Dilithium that was not destroyed did not go critical and explode. By selling or trading Discovery's Dilithium they are spreading the Paradox, as making almost not being able to fix.
After all these Star Treks Movies, TV Series, the Federation still clings on to the did not learn anything belief that Klingon Technology of "Cloaking" not to be used by Star Fleet Starships.
Personal Teleport capabilities? Discovery Crew should have been using Replicators to mass produce.
Not an original story idea as too similar the Fall of the Galactic Empire of Issac Asimov's Foundation Series, a new TV Series, the Search for Terra.