Till the roof comes off, till the lights go out...
We are talking about SEGA right now I imagine. No one would argue that Sonic was bad when it was first released. The OP implies modern SEGA.Wasn't citing modern success, was talking about the company as a whole. Whether or not they're making great games now is definitely debatable.
Also, Phantasy Star is still a thing. Most recent game was 2014.
The cultural barrier also comes into play too. SEGA seems to have a lot of games geared more towards the Japan audience that America/Europe never sees (See: The Hatsune Miku series). So while we can sit over in the west touting how much SEGA sucks, they might have a gigantic following over in Japan. Again, subjectivity comes into play.