Do I Deserve This, or Am I Ignoring the Red Flags? (Need Honest Advice)

I regret being so available for someone who is barely available for me. She's not romantic, and she doesn't even really listen when I'm trying to talk about something important. Whenever I try to open up about something meaningful, she's either distracted or brings up random everyday things in the middle of a serious conversation, making me feel like what I'm saying doesn't matter.

It hurts a lot. She's also still following her ex because he begged her to stay connected, and she's afraid of his reaction or presence. Honestly, I feel like I've been fooled.

There are many other red flags too. She keeps saying she'll change or fix things, but she never actually does. Is there any point in staying and hoping things will get better?

I've done so much for her, and she herself says I'm the biggest green flag she's ever met. Yet this is what I get in return. Do I really deserve this?