Hello Irene,
From what you mention, your dog seems to have a disorder related to separation, with respect to you, and therefore, when you are not, it destroys so much.
So that now you stop using the carrier for so long because you can dedicate more time to it, the only way would be to do progressive separation sessions. However, it will be necessary that even if you go back to work you continue doing these sessions for a short time, a few minutes is enough.
It is about leaving it out of the cage but with a good environmental enrichment, so that it has stimuli that keep it entertained and exercise its mind, senses and even the body, in this way it will less and less take into account that you are not that little a while. Use pheromones, clothes with your scent, toys like kong or bones and other toys that contain food, such as feed or treats.
Start with leaving it like that for 3 minutes, when you see that you have a good time without destroying anything, go up to 5 minutes. Thus, progressively, you can reach even half an hour or more. However, as it has the positivized carrier, as a good thing, and you do not want it to become completely unaccustomed, it will be better that when you go out for a long time you leave it there, remember that you have to be able to drink water and eat (depending on the weather you leave it).
The camera will help you see how your dog manages loneliness, if he pays attention to toys, etc., you can give him a treat whenever you want but you have to bear in mind that it is not the best for when you go out for long hours, because even if you give him the prize or you talk to him, the dog will know that you are not there. That is, it will help you better monitor the situation but in reality you will have to work the same as all of the above.
We also recommend that you consult in person the best guidelines with a specialist (canine trainer, educator or ethologist). If the specialist sees you in person and sees the behaviors, he or she will be able to give more adjusted guidelines and more ideas.
Greetings