Every monster should be difficult to fight. Currently, they seem to have very low HP; a group of four players can finish a hunt in under two minutes. This makes the combat feel more like a "hack n' slash" game rather than a strategic hunt where equipment and attack sequencing actually matter.
Additionally, I recommend removing the feature where monsters glow red before an attack. Countering should be a skill based on anticipating movements; having a visual tell breaks immersion.
Ideally, hunts should take at least 10 minutes when using gear appropriate for the monster's level. Extending the fight duration would make the victory feel much more rewarding. Spamming two-minute hunts destroys the "thrill of the hunt" and makes the experience feel trivial.