We try to make our fees go lower, but it will take some time and work.
We published this blog post when the fee model changed: https://localbitcoins.com/blog/new-bitcoin-network-fee-model/
Additionally there is information about the fees on the fees page: https://localbitcoins.com/fees
And also on the wallet page the fees are mentioned. The fee varies on depending on the bitcoin network situation. For example at this moment the bitcoin network deposit fee is 0.00036793 BTC - it has went lower recently.
But why are you charging the deposit fee when it is no related to you, it is upto the sender to pay the proper deposit and get their transaction confirmed but even when they have payed proper transaction fees you are charging them also the deposit fee, it is like one type of profit for you as you are not paying fees for our deposit then why to charge deposit fees.
This openly states that localbitcoins is looting the users who are depositing the bitcoins to sell, so you are getting profit from depositor and when they sell their also you are taking transaction charges. This is very bad status to your site.