Injecting is litterally the greatest thing to happen for pokemon.
It's helping to clean up WT, kills the nessesity of grinding and biking to get the mon you want, destroys the need to SR, Shits all over Batttle Maison hax by using your superior hax, lets you compleate your dex In a game that makes it near impossible to catch them all since Japan doesn't want to give mons to anyone who's not from their country.
The only people angry about injections are the people who stubbornly want to spend hours pressing up on their pad and/or eternally earthquaking/surfing hordes.