Great answer Habakkuk answer this specifically. You will for sure need a commentator though.

Everybody has a struggle they're dealing with, and this life is short. Don't worry about what others have or don't have.

(This advice isn't limited to Christianity)

In the book of Habakkuk, the prophet asks that exact question. The book is only 3 chapters long, so you may want to read it. God assures Habakkuk that the evil people will get judged, but all in good time.

There are many reasons the wicked seem to prosper. The book of Job teaches that God doesn't run the world by our concepts of justice but rather by His wisdom. There are many things that don't make sense to us, but God is working all things out to His ends.

As a Christian I feel so bad when I go through bad things and I see evil people living God lives it's so upsetting. And of late my faith is being tested.