Heavy Deal

Something that has become too complicated, difficult or uncomfortable to be worth it or, where because of the above mentioned, has ceased to be enjoyable or worthwhile.

I used to study really hard for my exams, but last week I had a nervous breakdown, so for me the whole thing has become just too much of a heavy deal.

I used to go to a salsa class, but the relationships there made it difficult, so I stopped going, it just became a heavy deal.