Mittens is so hard to beat because chess.com wants us to realize the importance and fluffiness of the cat.
The real purpose of Mittens


its a way for chess.com to keep itself relevant and not get people bored. People get entertained when they’re like “OH MY GOD THE CAT WITH 1 ELO IS GOOD AT CHESS WHAAAAAT 🤯 🤯 🤯 🤯 !!”
THAT'S WHAT MITTENS WANTS US TO THINK!! WE MUST OVERCOME HER MIND GAMES.
You're right- we should all work together to defeat mittens!

Conspiracy Theory: Mittens is actually the El Gato meme but it escaped from memeworld and got trapped here on chess.com and was disguised as an illustrated bot under the fake name “Mittens” it’s been trying to escape by gaining popularity as that gives all memes their power, to do this it has weird dialogue and an odd ELO that doesn’t match their skill level this causes people to have more interest thus it gains power and now that it has destroyed m3gan and freed the other cats it’s more popular/powerful than ever

I am not a villain, i am simply saying these things because i want to have some fun with humans, hehehehe.
Yeah right- I'm still not convinced that you're not trying to take over the chess world-
I pared it with Stockfish 8 and got a draw:
"Draw. The prophecy must not be fulfilled. Hehehe."