Dear, my english-native-speaker friends, is this sentence gramatically correct? (Help me)

 

They give their jealousy free rein by rampaging around those whom they think don’t deserve to be luckier than them.

(I'm not really sure with the red one)

Comments

You must be logged in to comment
Sweetboo #1
the sentences is 100% correct.
BellaSong
#2
That sentence is very correct, but I'm not very sure how you spelled "rein." I think it might be spelled "reign" though. Not very positive.
moonyuki
#3
I am 100% sure there is no mistake ... - Yuki