There is no main partisan divide like there is in the US or UK. We don't have a two party system.
The last election was basically a three way tie, with a significant vote share split across another handful of small parties and independents. It's way more complex than just FG v SF.
We have FF+FG, a pantomime to collectively keep the conservatives in power, and we have everybody else. FF+FG have been in power almost continuously since the formation of the state.