Can someone give me advice...

I have a nearly 1 year old cat which we love soooo much but unfortunately I think I’m needing to give him a new home. We live in a flat which he can’t go outside and explore as we can’t keep looking outside the window to see if he’s there and we can tell he wants to soooo bad as he’s constantly at the window scratching at it. His behaviour is becoming quite agitated sometimes as he’s broken/ripped up a few things around the house so I think hes doing this as he wants to go out and explore. Sometimes it’s like he doesn’t like me and my partner and becomes aggressive and sometimes even hisses at us/other people (we have never treated him badly in anyway) so I simply think it’s because he’s bored in the house as he’s only allowed in like 4 rooms due to me having a 2 month old baby.

I can’t help but feel so guilty and upset about having the thought of giving him a new home but I don’t think it’s fair on him at all and I want him to have the best life possible.

We’ve tried everything, toys, neutered, plug in sprays nothing works

I just need some advice :(