Bounce Rate can be optimised for blogs with articles. You need to do a bit research on it.
Those days are gone when writing good contents were good enough to maintain the real good bounce rate.
Now, Advance system/actions has to be followed then only you can pull down the bounce rate.
A Fast loading blog, fewer pop-ups, Clutter-free design & easy to navigate system moreover, the color of the theme (yeah It does matter)
I've few guides that can help you. Here the top 3 I believe that can help you.
Second: My Personal Guide
Third: Because Ranking First on Google
PS: I think first, or first two guides will be good enough to resolve the issue. In case, these guides don't help you then, you can shoot me message with your blog link. I'll try to figure it out.