why do i constantly get lux support

The Lux support who actually buys is decent. Safe laning and can be an additional damage source late game.

But the Lux support who rushes and buys zero wards? Fuck them, they can burn in hell.

Well simple really, lux support is quite good. I do it incase my adc can adc.... plain and simple. I also don't go ks'in at every opportunity tho.

How does one even Lux support with her mana costs? Do you max W?

She is terrible support with her mana costs and cds...

She's only annoying when you play supports that don't like to engage because she can constantly E and if you're in that area you basically just have to take it, especially at early levels.

But other than that, supports like Leona would destroy her. Her cooldowns are too high for a support and her mana costs are up there, the only person that reaches her mana costs is probably Nami.