Duck, I now christen you Duck "Chopper Reid" Dogers.
BTH, as shared by others, you are not alone.
I am not a fan of taking a helicopter above 2000' AGL.. and quite frankly why bother?
As part of my ppl(h) in SA we went to 9000' AGL in a 22 with no doors. (and ground level was ~5200').
The auto down was pretty interesting.
I'll climb for hills and mountains, but other than that, I like seeing the detail on the ground, part of the reason I fly helicopters.
In Fixed wing height doesn't bother me.
Though as Duck says, when I get bothered by the height, I just tell myself to 'Harden the F**k up!'... It does not take the fear away but gets me through