Reincarnated Troll, I Want to Be the Most Powerful One!

When Rosefon opened his eyes after being crushed by Universiade, he found that he had actually come to a different world and became a lonely troll. "What troll? Real or fake?" But he quickly accepted the reality. "Even if I am a troll, I will be the strongest troll!" The world is full of ill will towards him. How can he achieve his goal? (The bad parts in the early stage have been modified)