For starters, you already did the work of installing Origin and setting up an account. So even if you deleted Origin, you still already have an account so that work is a sunk cost. Second of all, you would have had to install that multi-gigabyte patch regardless of if Origin existed or not because you wouldn't have been able to connect to the game servers and play without it, so that has nothing to do with Origin. Third, the browser plugin is specific the the Battlefield Battle log feature. The game was designed to use a web browser as its server browser. It's something specific to BF and you would have had to do that to play it regardless of if Origin existed or not, and it's not a feature of Titanfall so you wouldn't have had to do that again to play Titanfall.
So right now, if you wanted to play Titanfall, your steps would be:
1. Install Origin.
2. Install Titanfall.
3. Log into Origin.
4. Possibly download a Titanfall patch (I don't know if there's a patch because I didn't buy it because I'm not a fan of CoD style shooters), which you would have had to do regardless of Origin's existence or non-existence.
Seriously, 90% of your problems with "Origin" were problems with Battlefield.