The conjugation of the verb to eat: http://www.tastingpoland.com/language/verb/jesc_eat_verb.html
They are quite similar. The closest English sounds are the 'g' in "mirage" and the 's' in "pleasure."
The difference is basically your tongue's placement compared to the post-alveolar ridge (the little rise between your front gumline and the roof of your mouth). The space between tongue and ridge is fairly open for ż and mostly closed for ź.
"men eating bread" is semantically identical since Polish has no present tense for this. WHY then is it wrong?
Of you say its hard then visit this website:
https://www.duolingo.com/comment/1560098/Polish-For-English-Speakers Polish For English Speakers - Duolingo