ciężko rozczarowany in English:

When he missed that penalty I was absolutely gutted.

Disappointed? I was gutted!

Neil's absolutely gutted that he's been dropped from the team.

He was gutted when she finished the relationship.

He was gutted and hung from the goalpost on the football field.

I was so gutted to find out my girlfriend was cheating on me.

Tom is gutted after his Britain's Got Talent audition.

Not to be confused with literally being disembowelled, someone that says they're "gutted" is devastated or extremely upset. I was gutted when I lost my job.

I just failed my driving test for the fourth time! I'm gutted.