I agree, dating is lots of fun!
I think it probably gets a bit stale if you're seeing the same faces on the apps all the time. Some of you may just be a bit unlucky, geographically speaking. I don't think it's all men on all apps that are the problem. Most men I've met or spoken to are looking for relationships and they're pretty open and sincere about it. I've met a few liars and cheats but mainly I've met kind, lovely people who are looking for love and romance.
I think what can happen is that men decide very quickly whether you're 'the one'. And if you're not, they may still really like you, but they're not ever going to get serious with you. So they may still pursue you for sex and companionship, and you're thinking they're on the same page as you, but really you're a placeholder for them.
I think that's okay if you know that's the case and you know they're also not the one for you. But it can be very upsetting if you assume they're going to fall in love with you.
That's why I alway advocate for open and non-judgmental conversation from the very beginning. Ask them LOADS of questions, find out what they're looking for, find out what they're looking for with you specifically, and generally get deep and meaningful so if you do decide to enter into a relationship, you know the terms and conditions.