Have you tried a buster cube or kong ?
There are various versions of them on the market at different prices, they may help to keep him occupied for a while which means at least while he's doing that he will be too busy to damage anything else.
Can't tell exactly from the picture, but he looks like he has a lot of border collie in him? He's probably getting bored, collies need a lot of exercise and also plenty of mental stimulation.
Another option would be to get him 'hooked' on one particular type of toy, eg frisbees, balls or rope pulls, if he focusses his attention onto one of those then it won't matter if he destroys them as they are easily replaceable and don't have any personal/sentimental value.
Could be worse though, years ago one of my dogs ate through an entire kitchen cupboard and its contents then had the fridge/freezer door seal and contents of fridge for dessert! Mind you, he was a big dog!
You have my sympathy, 6-12 months can often be a nightmare time for chewing due to teething and/or adult teeth bedding in. He should grow out of it as long as you don't let the behaviour become too much of a habit.