Keep at it! Sounds like you are making some progress. Lots of good advice throughout the forums - take what fits your play style and adapt. Example - I never could work out timing of fusions so went with a rare shotgun. Like you I was running a void Titan- keep working on that magnetic grenade. It's a great weapon. You will get better at consistently sticking. I used it a lot to trade kills when I knew I was not going to make it out of an encounter alive. I hadn't played crucible hardly at all before the bounty and never thought I would get there. You can do it. Just be patient and know it's a marathon not a sprint.