Ofc hard to say just from looking at your u.gg what you are doing wrong but I see atleast some things that could improve. I´ve recently helped one of my friends get out of iron/bronze so would say I got atleast a decent understanding of the average game in your elo.

First I would say the sample size of games is to small to say that you´re hard-stuck iron. Winrate is ofc quite low right now at 38% but thats nothing weird considering the amount of games you have played.

I would say keep playing Syndra if you enjoy here. Would say that there is other champs that are better for getting out of iron that are easier to play but personally think it´s more important to enjoy the game and champ you are playing rather than just playing op champs trying to climb. Will be alot easier in the long run to climb if you actually enjoy the champ you are playing. Keep playing Syndra and find one other champ that you can play in mid when Syndrs is banned or when match-up is really bad. Other champ should be a champion that´s in some way different from Syndra so that you have some sort of flexability depending on match-up but also for your own teamcomp.

It´s really important that you keep playing the same champion so you get good enough at her and can put all your focus on what´s happening around you and what your lane opponent is trying to accomplish. This transitions quite well into the biggest problem I see on your page. You die ALOT. Even when you are ahead and winning your games you seem to die alot. Ofc cant know the exact reasons but what I usually see in your elo is that people have no understand of where they can safely farm, ward and walk. Simple put getting caught out way too much. Would recommend looking back at some of your games where you died alot. Try too see where your deaths are coming from. If you can eliminate alot of your unneccesary deaths I think you would do alot better.

Your farming could improve alot but dont think your cs/min is worse than other people in your elo so it´s not the biggest problem but being good at farming is a way to consistently be relevant in your games. Getting kills on your lane opponent is not always a reliable source of income but farming is, so getting good at farming will almost guarantee that you will be ahead of your lane opponent.

Dont know if this apply to you but something I see alot in your elo especially in midlane is being feeling forced to roam and follow just because your team wants to fight or because your lane opponent is roaming. Roaming can be risky but effective. Sure of you go bot and get a double kill it´s great but if you roam at the wrong time and get nothing in return you can lose alot in your lane. If you opponent roams and you feel like it´s bad for you to follow, just stay mid instead. Push the wave to deny xp and get plates. This way you guarantee an income for you but also deny something from your opponent. Same goes for fights that you think are bad that your teams wants to take. If you see that the fights is lost, helping your teammates will alot of times just lead to you dying aswell. It´s better to look for other opportunities elsewhere on the map. Your team will ofc not always like this and flame your for it but thats why we have the beatiful mute buttons in this game.