1st mistake: It's not freaking called physalis if it isn't using the nuke equipment
2nd mistake: MLRS is not a rock, get it in already....
3rd tip: Try to get to highest point of map constantly for easier aiming, unless the enemy is very close, if it's mid range, just go higher. (saves you from needing to jump like mad)
The other mistakes were not your problem really....
Just that you curb stomping too badly
Dame da, Zen zen dame da ze.
No good, completely no good!
Now, repeat it in red!