Reed does shit in Secret Wars. Like, he literally does nothing.
He fails to stop the incursions, fails to understand them, fails to save his family, he fails at everything. Every single one.
If Doom did not say "Actually, Reed is better than me", and if Molecule Man hadn't heard it, then that would be the end of Reed, the Cucked. Cucked out of his wife, his son, his daughter, his friends, even his science.
Reed is not the one that fights the Celestials, or the Beyonders, or the Molecule Men, or the one who is all hope. He is just the guy that built the bomb that destroyed the Great Society-Earth, and that is the end of his contribution.