Complex sentence: Firouz Karimi was hired as the temporary head coach for the remainder of the season; he did not fare much better than Hejazi and the team finished 13th in the league, its lowest finish ever.
Split into simpler sentences: Firouz Karimi was hired as the temporary head coach for the remainder of the year. Karimi did not fare much better than Hejazi and the team finished 13th in the league, its lowest finish ever.