Query regarding shadow mewtwo

So i just returned in this game some weeks ago and just completed the inter-egg-sting event where we encounter shadow mewtwo.So this is my first and only mewtwo and i just want to know that why its ivs are so crap(Like around 22/45).Am i the unluckiest one here or has niantic made it like this for everyone ? I was so happy on getting it but after seeing the ivs not that happy :( please guide me on this issue. Thank you :)