excluding games that are buggy or glitchy as the main reasons
What was the worst game you played objectively. Not speaking to bugs and glitches. What game had the worst mechanics, the worst story, the worst gameplay, etc.
For me its final fantasy 2. fuck final fantasy 2. I loved final fantasy 1 and played it many times on my GBA.... mostly because of 8 bit theater. the only flaw with FF1 on the GBA was the absolute cancerous growth on it called FF2.