Hey, welcome to Fluther.
How would any of us be able to make such a vast generalization?
Gay women are humans, and humans are diverse, complicated, and difficult to categorize. By default, some of them will regard other women as sex objects, and some of them are respectful and looking for a serious connection.
Straight men might be more inclined to treat women as sex objects, because that is how our culture expects and permits men to act. But that is a reason, not an excuse. For what it’s worth, plenty of gay men view other men as sex objects too. It’s not the gender or sexuality, it’s the person that’s the problem.
Maybe the problem is not the gender you’re dating, but the pool you are drawing from. Are you doing online dating? Lots of men just use that for a quick hookup. Are you dating younger men? Most of them have not grown the hell up yet.