"En agissant seul, il doit accepter toutes les choses seul."
while "all the things" is currently a meme, it's not really standard English
Everything, or maybe "all things". "all things" is kind of literary, but both work.
"ALL THE THINGS!" hahaha. I had to laugh a little. Yes, I have to agree with lolaphilologist. Everything or all things sounds more normal in English.