Hi there.
Yeah, mine works ok. I’ve heard the death-grip thing too, probably something to do with the back of the phone being the antenna.
I’m on Orange and based in mid-wales so not the best signal around here anyway, but I’ve not noticed any issues. My son has the desire HD and I would imagine he’d be quick to tell me if he was having problems.
To be honest, it’s more of an entertainment centre than a phone for me, to the extent that I get annoyed when people call me on it. Films, music, games, internet etc.
This is my second phone too, as completely immersing the phone in a mug of tea isn’t the best idea.
Have you tried the signal booster app? Hope this helps.