There are options to make things harder. For example, when running a TF you could select enemies being buffed, then set to +4/x8. Or a player could opt not to slot everything with set bonuses and IO’s. One can challenge oneself, in other words. I’m doing that by playing “grinder mode.” No P2W, SO enhances only, and so on. The game has a decent default diff mode. Custom enemies in AE can add challenges, if you’re looking for something besides a farm with a maxed out toon. Repeating what others have said, but there are options players can take that don’t require messing with the game itself. And you never know when you can hit a wall. Everything is going great, then, all of a sudden, team wipe, due to various factors. A bit of that is a good reminder. A lot of it leads to player frustration.