In the past 24hrs, I've read many posted about people complaining about the 10th year anniversary event. How it was underwhelming and how they didn't get their shiny mewtwo or that it takes 7500 energy to mega evolve each evolution. There were also complaints just about everything else.
Look, these people have the wrong perspective on things. I thought the event was amazing! Amongst the awesome things were: increased xp, dust, candy, shiny rates, guaranteed raid catch, availability of all legendaries, mega mewtwo release, chance of background, and free lucky trinket. Like are you kidding me?! What more do people want? I thought it was amazing.
Just like in life, people need to have a different perspective and look at the good stuff. Sometimes, don't obsess with the result and enjoy the journey and the fun and friends along the way. Crashing out because of not getting that shundo/bg mewtwo, maybe you need to step away from the game and do some self reflection.
My $0.02.