I agree that the ending doesn't really add much; it's also at odds with the general tone of the series. Maybe they wanted to take the "your actions have consequences" to its ultimate conclusion and make sure Garret didn't escape his consequences. Or maybe someone up the production insisted on a somewhat happy ending.

You're right. That's exactly why they faked the suicide and why she was able to get close to him.
Although I really feel, like op, that it really adds nothing to the story. I feel like it should've ended after him throwing the backpack. it's him getting rid of source code, and data, and gadgets. So in theory his project is over, bees will be changed with different encryption etc anyway, so that's pretty much the end. Those that shamed died, those that they trolled/abused also died. That's kind of it. It's powerful, it works, and there's not really anything that can done to undo. So this little scene of the fake death, the cop tracking him, and the implied assassination doesn't really do much. The show already showed the the general populace are quick to give death threats and troll. It already showed bees are going extinct. It already showed the the GCQH are going to run surveillance on everything, including commercial drones. The ending really adds very little.
Koalas are telepathic. Plus, they control the weather.

On top of what everyone else has already said, I think faking her death allowed her to chase Garret without him anticipating it. If she had gone after him through official channels, Garret would have had an easier time evading her, as he was obviously able to evade all other attempts to catch him.

I also felt like it was much more likely that he pick up her tail and kill her. She didn't seem particularly threatening or stealthy.

Yes, that would've been a suitable ending.
I get that she was pissed at him, but I don't buy the tech savvy police officer turned secret agent off to settle a score by murder..
Cool soundtrack though, in the bar and as she follows him down the path, before the credits roll.

Well, you might know that, but the OP expressly asked why Blue was following him.

We know that.
I'm unsure if the show wanted me to root for her, cause I don't

Considering they faked her death, she wasn't there to process him through official channels. She was there to assassinate him.

Thank you! Most ppl have no idea how hard life was before throughout history and up to just a few decades ago

Sorry but life wasn't worth crap in the 19th century or the centuries before the19th century. Life was even more brutal with no laws that protected workers, children, or women. People died all the time and that was accepted as part of life. Unwanted babies were abandoned and orphans were taken to homes to be sexually molested, brutalized, and used for slave labor. The list goes on and on. If you were poor which most people were your life was one of nothing but exploitation.

hope the Waif did to him what she couldn't to Arya.
Was that the Waif? Thats pretty cool, didnt know that.

He killed near 400,000 people making him akin to Adolf Hitler and Napoleon Bonaparte.. I in no way am rooting for him and hope the Waif did to him what she couldn't to Arya..

I don't know what the point of her tracking him down was. I felt he was in the right when you consider everything. There are 8 000 000 000 people on the planet today, which results in everyone being poor, miserable, resources going depleted super fast and environment collapsing all around us. In episode they've already killed all the bees so they should be even more aware of this.
So human life simply doesn't have the same value as it did in the beginning of, say, 19th century.
Also, he made a nice cut by killing people who are horrible anyway and who were all willing to pass the same judgement on others. Very poetic I'd say. He sort of reminded me of national anthem guy for that, but better cause this guy didn't destroy innocent man, he targeted ppl who had it coming. So yeah, her going after him in secret was dumb, she'd be celebrated if she got him publicaly