Unusually small hands and more

Hello everyone i would like to share some thought and struggle im going through for some time its nothing new. So ive been working out since young age but i never managed to keep consistent (im 21 now) but this post is not about that, ive worked out for around almost a year and i made some gains but there is a thing i cant get out of my head. Ive been born with small hands, they are a size of a females (even some women have bigger hands than me), they dont look like that but they are small. Because of this, my forearms and especially wrist is very thin too and it looks bad and I cant do anything about it. moreover my calves are terribly thin too and they are not growing or growing very slowly, ive been training them a lot with little gains (Im 185cm or 6'1). Every time i compare myself to other people and how good these parts of their body looks. Every time i tried to gain weight it all went to my belly so i stopped. how can I cope with this? Its every day struggle and its killing my motivation... is this due to my genetics?