Could it be because he is boring/ predictable ? Except for his origin story and his last scene, he has been pretty underwhelming.
Also he didn’t change since he was unfrozen.
Others got married, had secret families, acquired new powers, got older, but cap is exactly the same as in 1945
Always single, always optimistic, naive. Never understanding the world around him, that misfit underdog allure didn’t last long when he got himself a flip phone.
I challenge you to a duel with pistols