Look at Adobe. They've got a full building-load of a team to work on Illustrator— versus the guys at Bohemian Coding. There's literally less people at Bohemian Coding than the number of fingers you've got on one hand.

Growth takes time. Fixing (everything) takes time— time the guys at Bohemian Coding didn't get as much as the guys at Adobe did.

Go switch to Illustrator, perfectly fine. Just acknowledge that the effort poured into Sketch— be it in the past or present— has been incredibly valuable, especially with the number of people they have.