Struggling with my 15 month old dog….

My dog was a really hard puppy, constant demand barking, reactivity on the leash, never settling in the house without being in his crate and we can’t leave him for long cause he freaks out in his crate and I need him to like it for my work from home job (he’s in there when I work) I felt like things were getting better around 12-13 months but over the last little bit it’s like things are regressing, the demand barking is back, the reactivity is back, he’s struggling to settle and I literally have no life cause I can’t leave the home Longer than two hours. He’s a lab/husky/heeler mix. Wondering if anyone has had similar experiences and have seen the light again. Some days I just feel so defeated