Yes...but when they first got their powers(except Sotha Sil who locked himself in that plane) they tried to help people. That gives evidence of good intetions,etc. Indeed, Almalexia did went "mad"(in a way) but Vivec was just bored of these powers and Sotha Soil as you said didn't even wanted the powers. I agree that they didn't had the right to take those powers but why didn't the true gods acted and stoped them?