I used to feel that way, but not anymore. I'm sorry if this is long, but I feel the need to be detailed:
Voices: not all trans women have worse sounding voices. A lot of us blend in just fine and go so far as to be awarded compliments and reap envy. To be fair, we're inherently at a disadvantage, but it is definitely not impossible to overcome it.
Periods & Pregnancy: I can't really defend this, and one of my prime replies to hateful people is "I would gladly trade having no period to make you stop trying to hurt and control me so much." There's no defense here, but it doesn't make cis women any superior and it's silly to feel that way. Really, what can we do about it? Does it change how we were made? Does it make our pain go away?
Some cis women can't have periods, and periods aren't (generally) treated as something grand and necessary to be a beautiful person. The closest of my cis women friends have never held periods above my head, and they think it's ridiculous that many people try to use them as a way to bind trans reality. They like to joke about how storing nutrients in the center of their body and dealing with cramps somehow buys their identity and allows them to be who they are, as if it were a gatekeeper.
My largest personal anguish for having no period ties into the next thing you mentioned: pregnancy. It's depressing at times, but at least we can still reproduce and there's no secret code that says you have to father a child beyond fertilizing an egg. With careful planning, you could definitely mother a child.
Socialization as girls: this gets to me, too. I can really understand this one. While it, at the very best, puts us behind the curve of being socialized as women, it again isn't necessary to become a beautiful person. Much of it can be learned or deduced when you're going through transition (or before then, depending on your life). It helps to make you a unique person with a wider array of perspective than most people. Many of us eventually come to a point where we have a fair understanding of both worlds, and we begin to see how much it has tempered our sense of decency and understanding for our peers.
However, what I think is the toughest about socialization is actual childhood memories. It's true, we can never get those back or change them. It's really painful, but again, we can't do much about it. Does it really make us inferior if we didn't get to wear dresses or weren't allowed to play with dolls, or that we would have been laughed at and harassed for wearing cosmetics? Does it really make us inferior when there are cis girls -- who identify as girls -- but have even more typically boyish interests than a lot of little and teenage boys do? I think all it really means, and honestly not even for all of us, is that we didn't have as much freedom to express ourselves as children growing up.
