@agaymi polish is baby stuff. polish has like what, two, maybe three consonants in a row? typically intravocalic so the syllable structure is still decent
but english, oh, Welcome to hell strengths /stɹɛŋkθs/
@agaymi they're not even that special or notable, they're about normal for a slavic language, even okay by european standards, except maybe the three-way distinction between laminal, apical, and palatal alveolars (although russian also has this to an extent, and so does basque but basque is not IE but anyway) i think it's just the orthography that looks rather weird that throws people off