Jersey is right, you probably don't need grounds. It's your motive for divorcing him, but you really don't have to spend time figuring out how to describe it to anyone else. You only need to know what things to avoid in future relationships someday, but for now, to look forward, once you decide you've had enough abuse, it's plenty to simply say it's over & you're ready to move on. Avoiding making accusations against each other about emotional abuse will help prevent it from becoming a nastiner experience than it needs to be.

Once you decide to live separately from him, there is no more need to figure out what you didn't like about him, or the way he treated you. You no longer need to argue with him about who treated whom worse, who argued less effectively, who was meaner, who did wrong & who didin't earn enough...

If you can stay away from all the blaming stuff & simply figure out how to separate your household from his, it's a whole lot better. And figuring out if you have "grounds" or if he's been emotionally abusive is some part of blaming that will not be helpful.