Nice guys finish last because women don't want 'nice guys' they want 'sweet guys' and 'gentle guys' and 'protective guys'. 'Nice guys' generally get confused and act insincere, or nonassertive, or any manner of red flags that women grow up and realise actually mark the jerks.
Moreover, it's not about how nice you are, or even how sweet, or gentle. It's about emotional connection, and if you can't actually connect emotionally, your niceness isn't going to make things happen for you.
Lastly, never, EVER, play the nice card for pity, or be cloying with it. These are not being nice, these are being emotionally abusive or intrusive. Know the difference.
Moreover, it's not about how nice you are, or even how sweet, or gentle. It's about emotional connection, and if you can't actually connect emotionally, your niceness isn't going to make things happen for you.
Lastly, never, EVER, play the nice card for pity, or be cloying with it. These are not being nice, these are being emotionally abusive or intrusive. Know the difference.