I had these issues when I first got Tucker. I can't tell you exactly how they fixed themselves, but they eventually did. I imagine that after I actually started coming home everyday that he got more comfortable with the situation. The addition of a sliding glass door doggie door helped immensely as well as allowing him the run of my place. He didn't like being gated and never took to a crate. One day I just gave him the condo and he respected it.
Can he see out of a window? That was a big issue for Tucker… With access to the balcony during the day and an entire half day of sun to lie in, he's pretty content now although he was never particuliarly destructive (unless gated or crated). Some people have issues with the balcony because their dog might jump. Tucker is a jumper, but he lacks the confidence to jump things he can see through. In other words, he won't jump a gate or the railing because he can see through it. He's not a counter surfer either although I have seen him jump a stacked railroad tie retaining wall that was 5' high.