They're all stupid.
"We are not going back." Great. It's all about Not-Trump and what you're not going to do. What is it that you are actually FOR?
"When we fight, we win." That's yet to be seen, isn't it. Also, with all the pearl-clutching after Trump's raised fist 'Fight, Fight, Fight' after his attempted assassination, it seems pretty hypocritical.
"Let’s win this/Together we can win this." Ugh. The next four years aren't about the election. Tell me what you are FOR, not about the election itself.
"We are not playing around." And again, you're telling me what you're NOT doing. Tell me what you're planning to DO.
Of course, the answers to what she's actually planning to do -- continue with open borders, climate change/green new deal crap, etc. -- is also problematic, but whatever.
Trump's "Make America Great Again" is all about looking forward and optimism. He gets what a slogan should be. (Even if Reagan did it first.)