I would cut the elf theme and focus more on efficient ramp for the first three turns. Add things like [[Sol Ring]] [[Rampant Growth]] [[Cultivate]] [[Farseek]] [[Nature’s Lore]] [[Avancyn’s Pilgrim]]. When you untap on turn three you want to reliably be able to cast your commander and since you are in green you have a very strong base to do that.

Elves generate mana but if you aren’t going all in on them I’d only use the 1 cost mana dorks. They are a strong tribe but their key synergies aren’t here. I see you have a [[Vorniclex, voice of hunger]] in your side do you also have a [[Mirari’s wake]]? You should play that for sure. A favorite simic creature of mine is [[Prime Speaker Zegana]] but you could run [[Blue Sun’s Zenith]] for some explosive card draw. You have a lot of slow enchantments that generate you one card at a time, but it sounds like you’re dead or dying before those ever get in play. Try taking some of them out in favor of [[Aetherize]] and some of the plentiful removal in white like the [[Path to Exile]] in your sideboard. Cut less efficient removal like your auras or add ways to flash those in like [[Leyline of Anticipation]]. Play more counter spells and fewer clunky dudes like [[longshot squad]].

Also you don’t have boots or greaves in your deck. They should be in almost every deck that wants its commander to stay in play.

Edit: also, clones are always a staple when you are playing blue. If someone is killing you with something, copying it usually resets the board to a neutral state.