When asked how they could predict the future, Q responded "control".

For instance, Q made a post about no-name being in the news, and one month later to the minute, he was pronounced dead.

No supercomputer could have predicted that event so precisely. Control is the only reasonable explanation.

There's no point in arguing the "what if both sides are bad" black pill. Even if good cop (Q) allowed bad cop (cabal) to destroy half of humanity before stepping in and becoming a scripted hero by "taking the cabal out", you would never be able to prove or disprove it after the dust settles, neither could you do anything about it even if you could prove it to yourself.