First of all, I'm very sorry for the loss of your brother.
Secondly, I don't normally post in this topic and let me apologise in advance as I'm a muddled thinker and writer and this may not come across clearly. But try to bear with me.
There is a scrip in Rev 12.12 that says woe for the earth for the devil has been hurled down. Also if you recall when Satan tempted Jesus he offered him the kingdoms of the earth. Jesus didn't refute Satans sense of ownership. I believe that Satan is in control of the earth at the moment. This isn't to say he causes all the bad things to happen. Eccl 9:11 says time and unforseen occurence befalls us all. Satan and man think they can do a better job at ruling themselves and at the moment they are trying it out. I can't really get into the depth of it here, but I hope it goes somes to showing why God isn't stepping in at the moment and solving all our problems for us.
God sacrificing his son on our behalf has to be one of the most loving things anyone can do. Jesus was a ransom sacrifice to counter Adams imperfection. It was prophesised in Gen 3:15 that this would happen. Jesus was happy to do his Fathers will throughout his life even to death. John 19:30 He called out It has been accomplished. Again this is a very involved subject as I'm sure you know, but it is an indicatin of Gods loving kindness and mercy to do this for us.
While God may not answer our prayers in the way that we want him to, he certainly will provide a means of coping with things that happen to us. For myself, using the knowledge I have I wouldn't pray for me not to lose my job, as a basic example, but I pray for help to be frugal in case I do, and to cope with it, if it should happen. One of the scriptures I easily remember is Phil 4:6. Do not be anxious over anything but in prayer, supplication and thanksgiving petition God.
There are also these:
Psalm 55:22 Throw your burden on God, he will sustain you
1 Cor 10:12,13 He will not let you be tempted beyond what you can bear, and also make the way out so you can endure it.
Heb 13:5 I will not leave you, nor forsake you.
It rains on good and bad alike (Matt 5:45), so logically bad things happen to everyone as well. So while God isn't intervening in human affairs right now, he is there now for us to give us comfort and help us to endure the things life throws at us.
Again, I'm sorry if this was very rambling and I hope that you can understand what I'm trying to say. Do get out your Bible and look up the scriptures I've mentioned here. I really hope you'll find some comfort and not alienate yourself from him. Draw close to God and he will draw close to you (James 4:8)