I hate losing games when doing well, i feel so powerless, and idk how to help turn it, advice?

I say well, not 10/0 by 20, but maybe 6/2 with higher or even cs then my lane opponent. I main taliyah, so that feeling of being powerless is worse, because i play a champion that can heavily affect other lanes and get them going, that's basically half her job. But i gank bot once, twice, thrice. Top feeds to seemingly nullify what i'm trying to do bot( or vice versa) , and my mid gets a double top, now if they were behind, they're gonna start snowballing. I guess i need advice on decision making, i can go at least even mid most the time. But i have trouble deciding when to gank top/bot, when to keep leads, and when to help with others, and what to do if the enemy starts to make a come back, i'm just naturally silent so i rarely type, and communicate with pings, maybe typing would help but when i do type i either get ignored or flamed. Any suggestions?