I have been unintentionally controversial as hell for a lot of years. I have worked hard at becoming less of a lightning rod for utter shit shows.
In my experience, how you say it matters at least as much, perhaps more so, than your actual point.
You should be trying to bring solutions, not complaints. If the entire point of your blog is to kvetch, then don't make it a "political" blog. Make it clear "this is me bitching into the void." It will be less likely to come back to bite you.
When you bring solutions, be incredibly careful to not point fingers.
The English bible says "The meek shall inherit the earth." My understanding is that the French version says "The nonchalant shall inherit the earth."
Try to be nonchalant. Try to be diplomatic. Try to educate people rather than lecturing them.
Many blogs are just noise anyway. Having big feels about something doesn't guarantee you will have anything of real value to contribute. But if you think you can make a difference, then, there are ways to be more Zen about it.
"If a tree falls in a forest and there is no one there to hear it, it makes no sound. Yet, it falls."