Glitched is a word that suggests an error or malfunction of some sort. Its antonyms would be words that suggest a smooth or seamless operation. Some possible antonyms for glitched include perfected, streamlined, optimized, streamlined, refined, faultless, reliable, and flawless. These words all convey a sense of efficiency and functionality, implying that everything is running smoothly and without any errors or problems. Other antonyms may include words like accurate, precise, consistent, dependable, and trustworthy. These words imply a consistent and predictable performance, which is the opposite of the unpredictable and erratic nature of a glitched system.