First, not if it comes at the cost of OTHER players. Which is why this ‘‘unfun to play against’’ is just bullcrap.
Second, many changes have been done to this game to pander to popular hero mains that end up making the game worse for everyone, including the people that they tried to pander to.
Fun has to be derived from you playing the game, not from getting everything a specific person doesnt like nerfed into the ground just because of it.
Fun for who? Ask yourself that.
When Blizz has nerfed heroes that are not balance issues purely because they annoy players of popular heroes, do you think that is fun for ‘‘everyone’’?
Do you think that Orisa being nerfed until she was a joke hero during OW1 was fun for the lot of people that played her?
This is a PvP game first and foremost. And people are unable to accept that heroes that annoy them are not necessarily balance issues.
You need to find a balance between what is fun for the player and for the players they face. Thats why its called balance.