I love latigo, but:
A defendant in a civil action CANNOT “counter sue” the plaintiff on the sole grounds that the evidence and applicable law doesn’t support the plaintiff’s claim.
Sure they can. That is pretty much the definition of malicious prosecution.
While I like the rest, this is a very unfortunate phraseation. (Is that a word?)
When you are a Bear of Very Little Brain, and you Think of Things, you find sometimes that a Thing which seemed very Thingish inside you is quite different when it gets out into the open and has other people looking at it.
--W. T. Pooh (aka A. A. Milne)