As per request to keep one thread on-topic, this one is made to list the attacks of NPCs which can be considered unfair for gameplay. To define that a bit more, unfair in this circumstance refers to a situation where the player has little to no control over putting forth a response to an incoming attack. This can include, but is not limited to: Attacks which have no visual indicator before its use (either by wireframe or other telegraphing means), mechanics which are unclear or not explicitly revealed, or abilities which may be overperforming in their intended function.
Some of the powers listed may be "unfair" based on opinion, but the goal is to identify powers which feel oppressive in an unintentional manner. This is NOT necessarily a thread for bug reporting on specific attacks, but should be used to identify mechanics which may need tuning to provide a more fair gameplay experience against NPC combatants.
NPC Shotgun auto-attack - Currently, several munitions-based villain groups utilize a shotgun that functions as their default attack. This ability has no visual charge-up time and very consistently knocks heroes around. The knock effect shouldn't be placed on an attack that is used so frequent as this one.
VIPER Rocket Pack - VIPER Powered Armors have a very well-known attack which suddenly, and for no real apparent reason, fires off rocket pods which instantly knock their target away. This attack isn't telegraphed, is instantaneous, and feels very random in firing off, even doing so in multiple volleys, resulting in moments where the poor player targeted by the Powered Armor can be knocked multiple times before the player even touches the ground. - Apparently this isn't a thing any more.
ARGENT Cyborg Chest Beam - The Chest Beam from the ARGENT Cyborgs, upon successfully knocking anything caught in its area, will instantly heal the Cyborg to full, or near-full health.
Mechassassin's Tanglecoil Launcher - Mechassassin's moveset is nearly a replica of Black Talon's. Black Talon's Tanglecoil is visually telegraphed, allowing the player to react to it. Mechassassin's Tanglecoil is not. It is instantly cast and more often than not results in the people in front of the launcher to become held.
Master Villain Default - He has no attacks whatsoever, which is unfair to him. He's more or less just a walking powerhouse dummy.