Okay, the hero in 'The Rebirth Waste Strikes Back' basically faces a stacked deck, but the fun is watching him flip the table. Obviously, there's the initial societal prejudice—he's labeled as talentless or weak in a world that values power, probably cultivation levels or something similar. That means every interaction starts with disrespect, from his own family to random arrogant young masters looking for a punching bag. Then you've got the knowledge gap from his past life; he has future intel, but using it without drawing suspicion is a tightrope walk. He can't just suddenly become a genius without people wondering why. The biggest challenge for me is the internal one, honestly. He's carrying the emotional baggage of a previous failure or betrayal that led to his 'rebirth,' so trusting anyone, even potential allies, has to be incredibly hard. Paranoia as a survival mechanism. Also, the plot usually forces him to secure resources everyone else is fighting over with a massive head start, so it's a constant, uphill scramble against time and stronger opponents.
I've seen some readers complain the challenges get repetitive—win a duel, uncover a conspiracy, find a treasure, repeat—but I think the tension holds if the side characters are well-drawn. The hero's real test is whether he can change the fate he already knows without creating worse consequences, which adds a strategic layer beyond just getting stronger.