That's essentially what the lawyers at my friend's company told them as well, as they're dealing with a similar problem. Just because you have lawyers doesn't mean the answer will be any different; you very likely won't be able to deal with a lawsuit from a much larger company.
If anything, it made me feel both unwise and ignorant, so I addressed that by going to law school and passing the bar. I have a great career and I keep my nose clean.
I also have a different perspective now - one of the creator instead of the consumer. And I disagree that Goliath always has to win. Sometimes the big guy is wrong; and thank goodness we have folks like EFF to help out when they abuse their wealth and power. When the little guy is on the right side of the argument, I will also stand up for them.
Keep in mind, too, that Kik doesn't exactly have overflowing pockets. They can barely pay their bills and nearly shut down last year.
You're lucky you were treated as nicely as you were. It could have been a whole lot worse.
Lessons learned:
1. Hire an attorney when you get a takedown notice if you think you are likely to decline, and seek counsel before responding.
2. Telling people "fuck you" doesn't get you anywhere, and it doesn't matter how impolite or wrong you think the other person is.