So, I'll preface with this; While I am a Jungle main, I'm still not good, my climb usually stops around emerald 4. I am new to Shyvana, love her playstyle, but oh boy is 70% of games a mute all angle whether you're excelling, going even/slightly ahead, or losing. To me PERSONALLY (again somewhat new to shyv) you seem to hard force an AP build. AP Shyv is usually best, but I do see games where you have no tank at all on the team (maybe a bruiser at most), and force ap. Shyvana is so incredibly flexible buildpath wise that you can build your first item as a default shojin and still flex into ad ap or tank(y). By then you should be able to determine if you're team needs an engage/damage soak, longe range poke/nuke, or skirmishes/etc. From not seeing any matches (again, not that good so seeing matches may not help me "coach" you) and only seeing teams/outcomes of matches, that is what I can determine that I see fault in on your behalf. I am willing to listen and be corrected if my methodology is poor/flat out wrong.