I love cooking, it's a bit of a hobby for me. Every day I plan, I love checking out fresh ingredients at the supermarket, I love hearing/reading what other people eat. But, it's sometimes a chore .... I'm not totally morphed into Betty Crocker 7 days a week
If you have fussy eaters combined with lack of motivation why don't you get into 'family style sharing' type meals? I keep banging on about him (Jamie Oliver) but, I love his concept of making rustic style food and it's all served on chopping boards, mismatched bowls and plates. That way, everyone can have bits of the things they like.
We've definitely moved away from plating up everyone's meal that's a carbon copy. I like to give everyone a choice of their favourite meal each week and having more relaxed, inviting looking food.
Everyone being involved in preparing/cooking/serving definitely increases their interest too. (My 6 year old's new favourite job is using the pester & mortar and my daughter loves constructing salads).