Well, you know, a lot of people find online is a good way to vent. But I think there are healthy ways to vent and unhealthy ways. If we vent by causing endless tirades of I'm right you are wrong (on both sides), it may 'feel fruitful emotionally' while you are in it, but it is when you are back by yourself that you may ask yourself, was it right to be that way? And it is that, which matters.
What is fruitful is taking the time, to learn something for ourselves, or to uplift others, guide others, but especially to be open-minded to others who are different (and we are all different and unique in our own way), and to be kind and accepting. And we should always rebuke evil - but not the man - that is the difference. You can love someone, and hate the evil in them, but to hate a person as the evil, this is not love, and it is not Gods way. We all have good things to say. We are all made in Gods image. But when life is a struggle, and we feel weak, and we get locked in judgement towards our life, ourselves, and then often to others, we find that we are only weakening ourselves, only to be in the same purgatory of it the next day.
If we love God, and we feel uplifted in that, then we should love others. If we feel angry at life, and maybe we are having a bad day, we should look to console rather than be angry at others. I like Francis Assisi's poem:
Lord, make me an instrument of your peace.
Where there is hatred, let me sow love.
Where there is injury, pardon.
Where there is doubt, faith.
Where there is despair, hope.
Where there is darkness, light.
Where there is sadness, joy.
O Divine Master,
grant that I may not so much seek to be consoled, as to console;
to be understood, as to understand;
to be loved, as to love.
For it is in giving that we receive.
It is in pardoning that we are pardoned,
and it is in dying that we are born to Eternal Life.
Amen.