I am a Total Drama fan, and I probably always will be.
I started watching this show when I was eight, and now that I'm thirteen years old, it may be a little sad that I still watch cartoons. Oh well.
But that's the thing: it's a cartoon. The target audience for Total Drama is 6-12 year olds, not young adults like most of us are. Most 6-12 year olds don't really care about solving the Gwen/Duncan/Courtney triangle or giving everyone an equal chance to shine.
They all care about fart jokes (Owen), poop jokes (the Flush of Shame), or explosions (Duncan). So yeah, if the writers don't really want to worry about continuity or giving everyone an equal chance to shine, don't take it personally. They're not trying to be cruel and narcotic.
They're just trying to apease their target audience, the 6-12 year olds.