My favourite anime has ended, so now I have nothing to look forward to on Sundays
「好きなアニメが終わったので日曜日の楽しみがなくなった」は英語で My favourite anime has ended, so now I have nothing to look forward to on Sundays もしくは An anime that I really like has ended, so now Sundays are going to be boring になると思います。
好きなアニメ – an anime that I like, one of my favourite anime etc
終わった- Finished, has ended, has finished
日曜日の楽しみ- (直訳) Sunday pleasure
無くなった- gone
Sundays are going to be boring – 日曜日はつまらなくなる