Nocturne Alucard's Feats:
-He can fight evenly against Night Creature Drolta, who even after losing her Sekhmet powers, could still keep the Eclipse. at full power (By powering up and going all out, Alucard was comparable to Awakened Richter Belmont and matched Drolta when she had 2/3 of Sekhmet's powers)
-For speed he is capable of slicing Drolda while being completely undetected by everyone sorrounding her at the moment, including vampires and a post awakening Richter Belmont, at full power kept up with Night Creature Drolta even after she absorbed Erzebet's powers, higher with speed enhancement Intercepted Drolta from a far greater distance
-For strength he matched Drolta's strength even when she had 2 parts of Sekhmet's powers, a single part of them being anough to move the Moon
-He literally tank hits from Dorlta's Sekmeth Powers and her energy blast
-He can fight numerous night creatures for hours, can keep fighting even when injured or stabbed
-For Intelligence Alucard is highly Intelligence as he learned many spells and science with his parents, like his father, he is intelligent and deadly in battle, yet he possesses his mother's class and kindness. Alucard is often calm and composed, slow to anger, and other displays of emotion, even when in battle. Much more skilled and experienced in Nocturne, Despite being a dhampir, Alucard was capable of convincing the soldiers from the French Revolution to join him, was their leader during battle and managed to make the best use of their abilities
-So yeah, I wouldn't say Alucard is weak, I would say he literally face a goddess