Complex sentence: He was initially hesitant to direct "Cold Feet" because he did not like the script, believing the characters to be too smug, however he changed his mind when he realised the programme was conceived for audiences like himself.
Split into simpler sentences: He was initially hesitant to direct "Cold Feet" because he did not like the script, believing the characters to be too smug. He changed his mind when he realised the programme was conceived for audiences like himself.