Someone explain why?! 😩🤧🥴

Can someone explain to me WHY it’s always the people who enter your life when you’re not looking, pursue you, tell you all these things and makes plans for you guys, but don’t put in any effort or reciprocate the same energy back and then randomly dump you saying they’re not feeling it? But then are on a dating app a week later saying they want something serious? Like THIS is why I’m 10000% done with dating. I’m 28 and it’s ridiculous with these little boys pretending to be men, it is so mentally and emotionally draining af!