For some barbarians, rage is a means to an end - that end being violence. Those who choose the Path of the Berserker, learned to focus their rage into an untrammeled frenzy. This allows berserkers to push their physical limits at the risk of their own health and well being. Due to this frenzy, berserkers are known to be an unstoppable force on the battlefield instilling fear and chaos to all who stand in their way.

Creator's Note: The intention of this homebrew is to improve upon the shortcomings of the official "Path of the Berserker" barbarian subclass while maintaining the fantasy of playing a berserker. If you have any questions about how I came to my conclusions for certain features just ask, and I'll gladly give my reasoning.

Frenzy

Starting when you choose this path at 3rd level, you can go into a frenzy when you rage. If you do so, for the duration of your rage you can make an single attack as a bonus action on each of your turns. When your rage ends, you must succeed a DC 20 Constitution saving throw or you suffer one level of exhaustion.

Imposing Presence

At 3rd level, whenever you make an intimidation check, you may do so using your Strength modifier instead of Charisma. You also become proficient in intimidation skill if you don't already have it. Your proficiency bonus is doubled for any ability check you make that uses intimidation.

Unrelenting Rage

Beginning at 6th level, while raging you gain resistance against psychic damage and cannot be charmed or frightened. If you are charmed or frightened when you enter your rage, the effects are suspended for the duration.

In addition, once per day when you finish a short rest, you can reduce your exhaustion level by 1.

Intimidating Strike

Beginning at 10th level, when you land a critical hit or kill a creature with a weapon attack on your turn, you can choose up to 6 creatures within 30 feet of you, that can see or hear you. Each creature must make a Wisdom saving throw (DC equal to 8 + your proficiency bonus + your Strength or Charisma modifier) or be frightened of you until the start of your next turn. If a creature succeeds on its saving throw, you cannot use this feature on that creature again for 24 hours. Once you use this feature you cannot do so again until the start of your next turn.

Ruthless Retaliation

Starting at 14th level, when you take damage from a creature, you can use your reaction to make one weapon attack against that creature if you are within 5 feet of it. If you are in a frenzy, you can move up to half your movement towards that creature before making your attack.