I'm lucky I live in a house, and can lock my cat downstairs at night,
he still makes a fuss but I have to do it as I work shifts and he
doesn't understand that I can't always play with him at 7am!  He's in
the doghouse today, my patrner caught him attempting to shred the new
sofa cover  - he knows he's not allowed to, I trained him, so he waits
til I've gone out and then does it!  But what can you do, he's not
allowed in my bedroom so he's allowed downstairs, I guess we can't have
cats AND care too much about our belongings.  Here in the UK, I've
never heard of anyone declawing their cat (in fact it's illegal), or
putting those plastic things on them, I forget the name, or even
cutting their claws.  We just give them plenty of things they are
allowed to scratch and hope!  Also they're allowed out more here so
it's less of a problem but my cat is nearly 17 so he doesn't really go
out much - I just have to accept that my furniture will get scratched -
next time I'll get a goldfish, only joking.

I was going to suggest another cat as from your previous posts he sounds like
he's a high energy kitty and needs a buddy to play with.