Hey if you can't kill marksmen i have a solution for you

do what every non-tank melee already does and play PvE until you win because teamfighting isn't for you

Good luck split pushing faster than an ADC will push a lane.

Jax nerfs when tho

I mean, that Jax was extremely fed. He had 4 levels on the Aatrox. It looks like it's a smurf playing tbh, and even if it's not he's just had a really good / lucky game up to that point. I don't think it proves anything when a champion that has a 4 level advantage can 1v2 splitpush. I've done that on Jinx, Quinn, and Ahri too. You get that big of a lead, you pretty much go where you want.

Split pushing is a reasonable answer to not being able to teamfight / to the enemy ADC getting strong and your ADC being too weak so you have no teamfight answer. However this video is not showing that. The kind of split pushing you need to do is strategic, have wards in the enemy jungle, take what you can before you risk too much, and really just consistently draw pressure for the enemy team to need to defend (instead of pressing their advantage) to buy your team time to recover and catch up, all while not dying / letting the enemy team get further ahead in the process. It's tough, and it's rewarding when done properly. When the enemy team doesn't respond and your teammates just defend turrets by clearing waves but not fighting for as long as possible you can often trade turrets 1 for 1 without losing anything else, ultimately leading to them taking mid inhib versus your side lane inhib (and the side lane inhib is typically better actually, as it opens up objective control on the opposite side of the map). If the enemy team does respond you're not losing those turrets mid (that you would lose if you defended 5v5) and if you get out you buy your team a minute to farm safely, push out the other waves, and catch up in general. Rinse and repeat, and that's how comebacks are made on teams that don't outscale (if your team DOES outscale, you typically want to avoid losing turrets as much as possible, as trading turrets opens the opportunity for the enemy team to end before you outscale - although trading turrets also gives your team a gold boost to get to that outscaled spot sooner so it's iffy).