I remember complaining about work to a friend and he said everyone goes through it and I don't know why but I got angry.

Actually I get overly angry about this as well and the reason is because stress or life issues isn't something we should feel it is normal to be used to. Different people are conditioned diversely and we don't actually control how we cope with life. This is why it is important for us to relate with people who understands how it is to go through what we are going through.
Not everyone is conscious enough to use their conscience quite properly and this is huge.