@Eriequiet has already expertly pointed out most of the issues. @Coma, and @vampire_blue have already pointed out your main issues… so I’ll abstain from commenting further on these.
I can understand your frustration, though. And I can see why your ego is hurt and screaming for you to “look stronger”. But that won’t help you.
I’m abstaining from questioning your motives (despite pottentialy agreeing with them) to focus only on the fallacy of your approach to these.
And with that said, you need to understand that having an intimidating body is a bad thing, not a good one. And for so many reasons!
So for the sake of argumentation, let’s just assume I am a bully and you are the guy coming in to defend my poor victim, ok?
If you show up with a very intimidating body, and I “the bully” am there with my posse. I simply cannot back out now. Because I must show o my posse that I am the “alpha male”.
So by looking intimidating, you are the one escalating the situation.
Now I will be actually afraid, but because I cannot demonstrate, I will go for you with all I have. Which most likely includes at least a knife or a gun.
Let’s assume you beat the crap out of me…
Because you are menacing, my posse will see you as an enemy, and they all will go for you.
Given that you are relying on weapons and on “making yourself menacing”, I seriously doubt you would win this battle against many.
Now you lie beaten out, and because of you there is a posse of people full of adrenaline and a defenseless victim there. trust me: they will now beat the crap out of those innocents, much worst than if you did nothing.
Now picture the same scene…
But instead of having a body that looks super intimidating and a bunch of weapons… you just look like a normal guy.
You come up to me, but this time I, “the bully”, don’t feel threatened by you. This is a great thing.
Because firstly I will feel overconfident instead. This is my chance to show off to my posse. So I will mock you. I will make fun of you.
But you won’t back off… So I will either push you or try to punch you. That’s when you can throw me on the ground and toss in a smirk remark.
Done. With that you saved a victim. Because now you discredited me. Which triggers a social behaviour where my posse will predate upon myself. They won’t give a fuck about the defenseless victim anymore.
I will try to beat you, of course, but now I will be unballanced with rage. So if you know how to fight, you can beat me easily. and that’s all you will need to do. The posse won’t be a problem anymore. The victim will be safe.
I am not telling you all this just to be “politically correct” or to “try and get you safe”.
I am telling you this as someone who obviously have seen, and been, on far too many more of those shitty situations than you. And who also chose to keep his head high.
As someone who grew up a goth kid in a city riddled with neo-nazi gangs…
Where you would have to always be alert and ready to jump to the ground, even on your own home, not to be hit by a stray bullet.
So trust me on this one:
You don’t want to “make your body into a menacing weapon”.
You want to learn how to fight instead.
Because when you do, when you truly learn how to fight, you’ll get past the need for vulgar displays of power or ego boosts.
You’ll understand that every single fight, every one of those shitty situations… they are determined way before the first blow is dealt.
And knowing this will allow you to protect others without even needing to actually fight.
Just pick an art that has some philosophy behind it. Some form of Budo, or a non-westernized Muay Thai, or a traditional Kung Fu, etc…