Honestly, bellend is a wonderful insult in my opinion. I used to watch a lot of sovietwomble and similar youtubers in the past so that and using cunt like a more colorful version of calling someone a dick were something i heard a lot and have a lot more behind them when said. That being said, I live in the US and would have to explain Bellend which would cause it to lose the impact. And cunt is far more negatively received here so you will likely be regarded as a mysoginist and/or get clocked here.