Laranja

Choosing a landing runway is usually simple for me, take a look at the airports metar and choose the runway thats closest to the wind direction, or if there is atc, take a look at the atis and plan the approach from there, but the other day i was landing in Lisbon (LPPT), on vatsim, the airport was uncontrolled at that time, so no atis, but the winds were coming from 290º, now lisbon has 4 runways, 2 of them, runways 17 and 35 are for the most part deactivated and usually serve as a taxiway, so were left with runways 03 and 21, now 21 is closest to 290, right? so i thought, but after taking a look at flightradar i noticed that aircraft were landing 03, others on vatsim were also as well, in fact simbrief had choosen 03 for me, i just decided to land 21 because i looked at the winds. Am i doing something, is there any other way to find out the landing runway from the wind direction. 290-210 = 80 < (360+30)-290 =100, so i would deduce runway 21 to be the landing runway.