How does one play the lux matchup?

Im getting decent at vex, but one thing i cannot play against, is f**king lux.
I can do decent against bad lux players, but go 1/9 to a decent or good one.
is there something im missing? or should i just permaban. (it doesnt help that everyone is playing lux mid for no reason)

If i seem a tad tilted. its bcuz i have just gone 2/10 against multiple luxes in almost consecutive matches