@Valar_morghulisAlmost in the same situation as yours but I appeared in interviews 1 year before yours and cleared mains with a margin of 38 marks;could not clear pre in 2018 and this time in 2019 flunked in mains;Dont know where it went wrong; I had improved content wise across all papers;
Sometimes I think it is Anthro; But next time I think It must be GS only; it is all just speculation...It was 4th attempt and any improvement can be made only after seeing the marksheet,though an aspirant can keep working hard across all dimensions; So quite undedided whether to appear this year or skip this attempt because it is very difficult to gauge where one must have missed given unpredictability of UPSC.