Ok, here goes my suggestions. Let's start with the mana base:
-2 swamp
-3 forest
+3 Foundry of the Consuls (this helps what the deck is trying to do, and you'll see we need more sac targets)
+1 Rogue's Passage (this is an important win con with your Jagged Scars
+4 Evolving Wilds (we're going to destroy your ability to make a T1 drop so these become good to ensure we have our 2nd forest by T3)
You'll notice I added THREE land there. Because of the 4 colourless land, that's important.
ok here comes the rest of what I think you should do. We're going to try and get you much faster wins here. We need to outrace Languish and have more ability to come back from one by having a lower curve to get stuff out fast. Think Tuskin Raiders or something. Let's be honest, elves are not a Tier 1 deck, but by going this route I think we're getting it as close as we can to almost getting there...
- 3x Thornbow Archer (awful, t1 is for taplands or evolving wilds)
+2x Bone Splinters
+1x Reave Soul
- 2x Deadbridge Shaman
+3x Fleshbag Marauder (with the Bone Splinters and additional Reave Soul, we have more control so we can run these. Beast says that this makes me a hypocrite because I'm always pushing synergy with Elves, but don't see these as Creatures. These are removal spells)
- 1x Reclamation Sage (this guy is an overcosted nightmare, he is ONLY playable with Bellower which we're taking out)
- 2x Gilt-Leaf Winnower (in a deck like this, you can't play stuff that you're tempted to hang onto. And this is way too expensive. We can do better stuff with 5 mana and we have enough removal now)
- 1x Woodland Bellower (I strongly believe this dude has no place in an Elf deck. He's a control guy)
There we go baby. This is as close as I think elves can get to being competitive, and it still doesn't make them tier 1. Give it a spin if you want. Try 3 matches at least. It's faster and you're trying to kill sooner before your opponent finds solutions.
I should mention this makes the deck harder to play correctly. You will have way more decision points in a match. But a good player does well with a broader toolkit so I think you'll appreciate your additional options now. Go get em!
edit: I added two more land in this version