When not to split up the VO verb?
First, I think that the sentence should be:

虽然是坑爹了，但是认错态度很好。
(He made some mistake, but he had good attitude for admitting his mistake.)


坑爹 means did something wrong, it's none of his father's business,or you can say 他做了不靠谱的事，但是认错态度很好。

Second, 认错态度 means has a good attitude for admitting one's mistake.

Such as:

对于历史，日本没有好的认错态度。
（For history, Japan do not has a good attitude for admitting its mistake ）