How do I stop losing in comp?

I’m a lifeweaver/moira main, and I’ve been having some problems with positioning, especially with life, even with his new platform which is one of the best changes ever made to an ability, I can’t quite position myself to life grip or heal that one teammate that could’ve been saved if it wasn’t for that damn wall. The platform is really useful, but if I just stay on the higher ground I can’t get close enough to my team, and if I stay on ground, I’m too vulnerable. What can I do to do better? I’ve been on a losing streak for some days now, and I’m a level 30 with life (that’s a lot for me)