Hello, I'd like to help you with your question.
It sounds like your brother may have a personality issue. Yelling at you and trying to boss you around is not respecting you, it's hurting you instead, which is putting his needs before yours. It also sounds like he is unable to handle his own emotions, so he takes them out on you (and maybe others).
People who are negative tend to be difficult to be around because they affect how you feel about things. And if they take the negativity further and act out in harmful ways (toxic behavior), then you can begin to feel stressed, upset and anxious about being around them. Their behavior can sometimes be considered a Personality disorder in Psychology. Here is a link to help you see how they relate:http://www.nmha.org/go/information/get-info/personality-disorders
Toxic people can include family, co workers and even friends or neighbors. Being around them feels draining and unsettling. Their issues can be the result of mental illness or past abuse, where they learned to cope with the loss of love and care by adapting their behavior to get attention.
There are different types of toxic behavior. Some people feel they know everything and everyone else does not, some criticize and predict doom and gloom with every situation and others are dramatic, making a big deal out of everything. They can also focus a lot on themselves, making you feel insignificant and bothersome. Some are emotionally draining, needing your help with everything.
One of the best ways to deal with toxic people is to try to eliminate them from your life, but if you cannot avoid them completely, as is the case with family like your brother, try reducing your contact as much as possible. Avoid contact unless you must be in the same place. When he talks with you, offer short, neutral responses. If he tries to rope you into an emotional situation, have a neutral response ready like, "Sorry you feel that way" no matter what they say to you. Repeat as needed until he loses interest and leaves. And keep in mind, he may be your elder but that does not give him permission to hurt you.
The only way to cope with toxic people is to reduce contact as much as you can. Unfortunately, everyone at one time or another must deal with people who act out. It helps to seek out others who are not toxic and develop good relationships so you can have a balance in your life.
I hope this has helped you,