How to prove someone is scripting?

So first of all. This shall be no Witchhunt, i just want someone helping me out with some professional opinion (since im only a silver pleb that doesnt play that well)

So i just played a syndra in ranked with my lux and we got stomped by their team, which is fine we dont deserve to win this game anyways - but something really Bothers me and that was my opponent on Lane.

before you continue reading: im not a bad loser and im not making a post like that after i got my ass beaten (i admit my defeat MOST times)

So.. im starting my lane as usual and try to stay safe behind my casters hoping for the meeles to come so i can lasthit (i mean fighting syndra early as Lux went not well for me the last times) First syndra q on point, second q on point, even the third and the fourth went straight in and i was down to 0 pots and 50% HP

Fortunaly im premade with twitch jungle who ganks me right away and we get the First blood which was worth then, so i stay a lil to get my lvl 3 and looked to back after i thinned the wave so it doesnt crash - Syndra came back - Wave is pushing my way - i try to stay safe but BOOM - As soon as she hit 2 i got a perfect q + e combo in my face (i mean im not that bad in dodging and if i get hit ill learn and am not mad) but this happened 3!! Times in such a short period that i doubted myself (i didnt see her q coming or something else was wrong with me)

needles to say that i didnt hit anything on her. She even Dodged my R out of sight whilst she was going for my twitch in jungle (okay it wasnt the best r. but everyone is silver has at LEAST some reaction time, but Syndra hat like 0 ms and 100000IQ proccessing everything in Microseconds)

I could provide the replay if someones interested or the LOG link..