Mulkin Theodore Svetoslav yana da alaƙa da kwanciyar hankali na ciki da kwanciyar hankali na ƙasar, ƙarshen ikon Mongol na Tarnovo, da dawo da sassan Thrace da aka rasa zuwa Daular Byzantine tun lokacin yaƙe-yaƙe da Ivaylo na Bulgaria .Theodore Svetoslav ya bi tafarki na rashin tausayi, inda ya hukunta duk waɗanda suka tsaya a kan hanyarsa, ciki har da tsohon mai taimakonsa, Uba Joachim III, wanda aka zarge shi da cin amana kuma aka kashe shi.Dangane da irin zaluncin da sabon sarkin ya yi, wasu jiga-jigai masu daraja sun nemi su maye gurbinsa da wasu masu da’awar sarauta, wanda Andronikos na biyu ke marawa baya.Wani sabon mai da'awar ya bayyana a cikin mutumin sebastokrator Radoslav Voïsil daga Sredna Gora, ɗan'uwan tsohon sarki Smilets, wanda aka ci nasara, kuma kawun Theodore Svetoslav, despotēs Aldimir (Eltimir), ya kama shi a Krăn a kusan 1301.Wani mai yin riya shi ne tsohon sarki Michael Asen II, wanda bai yi nasara ba ya yi ƙoƙari ya shiga ƙasar Bulgeriya tare da sojojin Rumawa a kusan shekara ta 1302. Theodore Svetoslav ya yi musanyar manyan hafsoshi goma sha uku na Byzantine da aka kama a lokacin da Radoslav ya sha kaye ga mahaifinsa George Terter I, wanda ya zauna a wata ƙasa. rayuwar jin dadi a cikin wani birni da ba a san ko wanene ba.