Can you please not splitpush if you're behind?
If you're behind and repeatedly shoving lane to the enemy tower, you're not doing anything productive. In the absolute best case scenario, you're giving the enemy laner free cs, and in the worst case you get so behind that the enemy top can freely roam and just pop top every once in a while to stop you from taking inner and kill you for free.
Regardless what champion you're playing, the whole point of splitpushing is to force the enemy team to have uneven fights because they have to send multiple people to you or lose objectives, while the rest of your team pushes a single lane. If you are not capable of drawing that much attention as a splitpusher, then either freeze lane and try to farm or group.