Why yes, him looking through your phone (without your permission) is a huge red flag, let *alone* him throwing it and breaking it. (This is both an intimidation tactic and a control tactic. Just, you know, FYI.)

And yes, it's hard if you've put this much time and energy into it, and it's hard if you're living together, but it's also true that abuse is so much more than if he's just hitting you. And if you're already in a place where him throwing your phone and breaking it is just sort of mildly startling? You are far too far down the path of the abuse being normalized already. Yes, love is good. Love is even better when it's not jealous and controlling. Take this opportunity and exit sooner rather than later.