Can someone go over my replays and tell me what I can do better?

In regards to your Lina game, I'm guessing it's around 3700?

I noticed that you don't check your enemy heroes' inventory like when you ran into SF even though you saw him pushing down mid-lane. Try to get into a habit of checking enemy inventories and ping it out to your team. You had the right idea to go farm your euls since your team was behind and there wasn't really much you can do on your part since your team keeps going solo dives/pushes for some reason. I guess you wanted to play Lina mid but was forced to support? You seem to have mechanics down but I think you overestimated that Euls into Euls to block SF ult. You shouldn't put yourself in that situation and think Euls is enough to save you.

I personally would've liked to see a forcestaff or a blink or both but that's about it. Overall decent gameplay from your part for your level; just need refinements. Considering your team in this game wasn't so hot, there's only so much a Lina support can do.

Actually on 3700 they constantly ping enemy items... which they have for 5-10 minutes already.

Oh, didn't see it for some reason. That is actually worst then since it was pinged out and Lina still got caught.

And you can't see alt-clicks when watching a replay.