Loki is one of my favourite characters in the MCU

He died, saw his life end as a variant, and is the only one aware of kang. yes. pain.

*Is aware of kang*

Tony Stark? Has to deal with rivals, alcoholism, few friends, being an orphan, losing money to support an unpopular vigilante group, being useless outside of tech, having to care for a daughter and wife while crime-fighting, being disliked for his personality, being mistreated and framed for things, assaulted, hated as a celebrity, in the comics his good friend Tiberius Stone stole his girlfriend and almost took over his business, his cousin Morgan becoming Ultimo to attack Stark Industries, being kidnapped by terrorists, having heart problems... need I go on?

Tony definitely had the most pain not to mention he had to sacrifice himself so everyone including his family could live.

Yea he legit died, I’m pretty sure death is painful

FACTS

I feel like Thor has more pain

Same

I agree with someone else here...I think Thor

-He watched his brother die like 4 times (I do not know the exact number lol)
-Both his parents are dead
-Watched his home planet explode
-Has to deal with Tony's tude...
-AND MORE!!!!

I agree with everything you said there except for one thing...
Tony’s attitude is what makes him Tony xD and everyone has to deal with that