Not sure I share your confidence he will lose interest op. This guy trashed your garden and then had the audacity to come back! Physically hurt himself! Threatened to blame you! Not only that, he then asked for your bank card! Called you from a fake number when you wouldn't answer the door. Then called you 10 times in the night, then turned up at your house again!
He's seriously unhinged.
You saying 'he'll lose interest and give up' probably comes from a place of what YOU would do. Or what you think the person you thought he
was would do. But he isn't that person!
Last week, would you ever, ever have thought he would behave as he has? Heck, when you first started dating him, would you ever have thought he would have became a jealous, spiteful bf?
These sort...you never know whats going on in their head. And telling yourself they'll lose interest...yeah, I'm sure lots of women who were killed when they left their abusive partners - thought exactly the same thing.
If you don't want to call the police, at least report it with 101 as pp said. Good idea about a camera too!
If he knows your work schedule, I'd vary that too. Leave the house at a different time to usual as he will be waiting to ambush you. Tell your work/any social engagements about him.
A man who can physically hurt himself can hurt you too. Don't be fooled into thinking these sort accept no for an answer. Even eventually. You'll probably find best case scenario, that even if he soon stops for a while,he will at some point down the line, start showing up again. Maybe the next time some other woman tells him 'no' and he's mad about it.
Good idea to get away for a while. I just hope you don't come back to him having trashed the place again. Still, better to be out if he might do that anyway. Safer. Because this guy is absolutely a threat to you unfortunately.