Don't like the sounds. Fine.
Don't like the way LFS is developed? Fine -> play one of the other 'sims'
Don't like the developers themselves? Fine -> do a better job
Dave was able to spend a lot of time on the sounds, Scawen was constrained by time and the community begging for a patch.
Lots of other people might be better at 3D work or mapping or track creation than Eric, but until HE/THEY want to let 'us' then we'll live with that. If you want to do it yourself, play rFactor and weep at how bad it is.
LFS is being developed in their own way, and they've always been open about it. Scawen will usually talk about anything that he's doing, but won't talk about things that might happen in 6 months time because he simply doesn't know what he's doing in 6 months time.
Being rude, which is something the devs have never done (except Victor, once, but that's an exception), just makes YOU look silly. They've never promised us anything and not delivered it. I'm sure all three of them have, in the past, tried self-pleasuring, but I doubt sufficiently for it to be used as a noun. I don't see you improving track textures, or tweaking sounds - if you are so perfect, then get off your soapbox and muck in with the rest of the clever chappies here.
Personally I think a months forum ban would be the least you should get.