On "X is sexist(or whatever) fix it for me" -attitude

People design stuff to make their lives better, they aren't obliged to design stuff to make someone else's life better. Sure you can (and probably will) at some level benefit from other people's inventions, but it shouldn't in no way to be expected.

If it's about funding stuff that excludes snowflakes, then so what, people can invest their own money in whatever they want and they usually do so because it betters their own lives. i.e. men probably will invest in products that work for men; if it has a benefit for the individual person investing in it. e.g. I won't have a baby seat in my car, so it would be better for transporting babies, because: I don't have a baby to transport. No one (in their right mind) spends money in excess stuff that they don't need, they'll invest in whatever will suffice.

So if you want something, do it yourself or invest in it yourself. Don't expect others to do it just because you feel you are entitled to it. People will consider you if there's a benefit to it, it pays to consider you; if it's worth it; if YOU are worth it.

Other people aren't charity organizations for you, they have their own lives, own problems to consider. To other people you, your life and your problems aren't more valuable than theirs.

Let's say seat belts are somehow sexist and doesn't consider women, then if that bothers you design better ones. Everyone else is pretty much satisfied how they are right now; current seat belts fulfill their function.

Find like-minded people and fix the problem, but bear in mind that the seat belts have that diagonal belt going across the chest to prevent the excess movement of the torso in a crash, so if you can offer a better solution, please do so, otherwise stop nagging. Other people aren't here to serve you, you just aren't that important to them. Much like apparently other people's time and lives aren't that important to you since you can whine when they don't make stuff for your leisure.

TL;DR: Stop pointing your finger at stuff and demand that other people should fix them for you, because you have a problem with it. Don't nag and wait until someone else fixes it, that's just entitled and lazy. Take some responsibility for yourself and fix your own problems. If there are other people with the same problem, band together and fix it yourselves.

PS. People will make stuff for you, if there's money to be made from it: so pay up. Make it worth their while. Be valuable, worth something. Bring something positive in their lives, so they might invest in bettering your life. (Note: Nagging and whining isn't positive)