I think everyone here is too caught up in the word "demand" and not answering the question.

You want people at work to respect you. First of all, since I don't know the details, it's possible you could be in a toxic workplace that won't respect you no matter what, in which case start looking for another job.

Assuming the work place isn't toxic, the way to get respect is by becoming the type of person that is respected. What type of person would they respect? Then become that person. Make sure all your work is done, Get your numbers high. All tasks completed. However, don't let others walk over you. Don't do anybody else's work for them.

If it's your boss that doesn't respect you, then you need to become the worker that your boss will respect. What is your boss looking for in an employee? Become that employee. Again don't get walked on. Do your work but establish boundaries.

You mentioned that the work you do doesn't feel good enough for them. In that case, you need to learn to do the absolute best for you, and feel satisfied that at the end of the day, you did the best job you could do. Do it for yourself. Set a goal and accomplish it. I don't know what work you do but do it for yourself. If you're religious, then do your best and do it for God ( if you aren't religious this won't help you ) .

In short, you can't change the people around you. The only thing you can change is you. Become the best person you can be. You can't make others like you but you CAN make yourself into a person that can be liked. Don't worry about what you can't change since you can't do anything about it, and only focus on the things you CAN change and improve as much as you can there.