Except one of those matches, where you had a Katarina, the rest your team was full AD + Leona/Nami. I don't know what kind of damage you expect you and your team to do when you allow the enemy team to go full Armor.
I am not judging or "hating" but to be honest, I am doubting you are playing to perfection. Except that game with the fed Aatrox, looks like all lanes lost. And KDA really doesn't matter. "I didn't die" is not an excuse. Sometimes it's ok to die if it sets up your team to take objectives. Granted when being behind, that is very tricky, but if you say you were doing so well, I am sure you could have just ulti-ganked other lanes (in fact, that's the most annoying thing about enemy TFs), to at least get a shutdown for yourself and help regain some control of the lanes.
Also, in none of the matches I see on your op.gg, you didn't buy a single ward, and considering Nami didn't build Sighstone (or maybe sold it at the end?), vision control is really important. Particularly for you, even if your ult gives vision, you want to set it up and isolate targets. I'm not sure how fast AD TF can kill a target, but "mainstream" TF can delete a squishy, even when behind (but well farmed).
I am a scrublord myself, but if you truly want to improve with your current playstyle, stop blindly blaming it on your team. If you can truly say that you are glad of how you played those games and that you played them perfectly, sure, but do it after you are sure you can't pinpoint a single thing you could have done better.
As far as Leblanc goes, she has a nice early but falls off really hard, as I'm sure someone will have mentioned. She can be annoying but you shouldn't have much problems if you can land a gold card on her out of position. Also she needs to go in to land damage in teamfights, and she is really squishy, do the math! (This comment has been brought to you by Zky, who lectured me in the cons of LB :3)
Cheater skin... tsk tsk.
