Unfortunately, you have to realize that your once sweet pet is not 'mean' but just doing what nature tells him. Roosters duty is to pretect their flock-they cannot rationalize that YOU are their provider and apart of that flock...Springtime is the worst as their hormones are in overdrive. He is not much of a ''pet'' if he is attacking everyone.
You can always wear tall rubber barnyard boots- but what if a small child gets attacked...those leg spurs of theirs do damage! And you bird is a BIG one- young too as I remember you saying- so his spurs may not even be fully developed but even stumpy spurs HURT. My bantam cochin roo got me in the knee caps and punctured me thru my jeans and made me bleed and I had a bruise for 2 weeks. NOT FUN.
You can de-spur him so at least he cannot slice anyone- simple get a hold of him, have someon grab his spurs with plyers and gently twist until they pull off. They will eventually grow back and you can do it again when they do. They may bleed slightly, but mine didn't and he didn't put up a fuss either.
I understand not wanting to shoot him, but think about giving him to another farm home (heck give him away as a 'junkyard dog' LOL) but give him to someone who knows chickens has the space (no small children around) and doesn't care that he's aggressive.
good luck!
ps.. I have 9 roosters that free range nicely together- some tiny roos that are aggressive, but so small they don't hurt us even though they TRY! we also have the bantam cochin boys in my avatar pic, "Brian and Tarzan" they were once very sweet but now Brian (de-spurred) will hunt us down and go for our legs- he gets up as high as my FACE sometimes! But Luckily we have a giant tom turkey that sees a rooster pestering us and he is stealth like Batman...he comes out of no where and stomps on the rooster, he'll even pick up the tiny ones and chuck them...LOL... we did this past winter end up shooting a rooster though- I felt so bad ad he used to come in the house and sleep on his back in my lap while I watched tv, but it got to the point where everytime I went into the coop to feed his hens he would attack my hands when I reached for the food dishes one time I bent over and he nearly got me in the face- scarey. Not worth the time and money on a dangerous bird

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