I don't think he is dead. I saw some raws and Peter is carrying him in his back while they're talking. I don't know what they're talking about but Thaddaeus is responding to Peter (I think he is, I couldn't remember clearly since I saw that raws when I'm drop dead tired from school).
They didn’t, he’s a legend, of course he’s gonna be the strongest, to be honest i think that your complaint is useless as you could see from the start that he was going to be an op character.
Its because of the raws, Thaddeus and him faught One man phillip and they lost...so they kinda nerfed him
Well my bad i read it wrong. Man you spoiled me, well they probably did nerf him but tbh they just finished a fight so they’re in a weak state.
SPOILER
in ch.72 Peter's gonna seek out Nathaniel to treat thaddeus
BLESS YOU OMG IVE NEVER BEEN SO HAPPY TO BE WRONG
I think Thaddeus is dead. Kinda frustrating that they kinda nerfed peter just to make "one man" op. I was like bruh, One man "phillip" is a mercenary like you too. You're obviously has so much more experience in combat against that. Why are they nerfing him , is it for the plot?