I do think it’s perfectly serviceable just making small tweaks to make it a little more scannable. I do, however, think you can be taking more advantage of your structured data. That’s the disadvantage of google, they have to show results for mostly unstructured data, so I don’t think you should compare your results to theirs quite as much.
I will only post this since it was asked, and considering I already whipped it up no reason not to see what you think.
I like this approach because while it’s not a table format, it still allows you to quickly scan the results to find what you are looking for. The most important aspect, the title, is first. If you happen to remember who posted it and/or when, you can quickly scan for that to the right. Last, but not least, the category/tags are at the bottom providing a little more meta data in a consistent location.
Like I said though, this might be overkill, what is already there would be fine with a little polish.