I don't know if you expected to get sympathy for this, but I'm going to point out several problems.
1.) You're playing against an assassin as LUX, one of the most squishy immobile mages.
2.) You didn't respect the Talon lv2. This is attributed to your lack of understanding of Talon or just you being bad. He has a very powerful lv2 all-in AND you let him hit both on his rakes on you. You. Let. Him. Get. Both. Rakes. That should've been an indicator for you to back the fuck off or predict his flash, not throw a fucking E lol. You 100% deserve that death. Main counterplay to mid-talon early game is DON'T let him get his rakes off on you. Simple and straightforward.
3.) You are reacting wayyyyyy to slow. In the time he flashed-Q-auto'd, you only threw out an E. If you're going to play a freaking Lux vs ANY assassin, you better make sure your reaction time is on point and understand when they can all-in you. Clearly, you did not understand that a lv2 Talon hitting you with both sides of rake and still having flash-ignite up on top of being 50% HP at 0:03 in the second clip was enough for him to finish you. Let me tell you if you're pushed up that far as Lux with 50% HP any fucking assassin is going to put you in the dirt. Please learn how to play mid-lane.
4.) You should've taken a defensive spell for this matchup. Like barrier. You literally just stood there and let him unload on you.
In conclusion, this is not an indicator of Talon being OP or whatever you are trying to imply. He is, in fact, very strong atm. But the clips you showed only showcase your incompetence and lack of understanding of the match-up. Sorry to burst your bubble, but you are just bad.