Each class plays differently. I just started a Titan a few weeks ago and this recent iron banner was my first attempt at pvp on a Titan. I learned real fast that I couldn't play the Titan like I do my hunter. One of the big differences is the Titan jump. It's not good for quick situations, especially when compared to blink. So you have to be more situationally aware. Use your surroundings better. Shoulder charge is great when used properly, but it shouldn't be your go to ability. Use range to your advantage as well. So many players rely to heavily on shotties and fusion rifles. So stay back and pick them off with a good scout rifle or something with some range. Once you learn you can't play the exact same ways as hunters and warlocks you'll start getting better. If you want to play like a hunter or warlock then you should go create one.