I don't know where you all go in Paris but I've never experienced any sexism or sexual harassment. And I have never seen a squat toilet there (though I did have to use on in Brittany once).
I visit Paris several times a year, and always love it. I find it cleaner and nicer than London (for example, I don't know where all this mythical dog poo is), though I do love London too. And some of the best meals I've had have been in little restaurants for 10 euros for three courses. The bread, the chocolate.... I'm trying to find time to book another visit over the next couple of months and I can't wait! I always come back laden with meringues and macaroons 
Paris most definitely has downsides; the metro can seem very outdated (and can smell), there is a lot of graffiti, there are a large number of beggars and scammers compared to London, the hotel rooms are always tiny unless you have serious money to spend (I don't) and they will always charge you extortionate rates for breakfast (but given breakfast is usually a buffet affair, I take advantage of this by smuggling out a couple of bananas and some bread for lunch). If you don't know your way round it can be confusing, and the queues to get into the big touristy attractions like the Louvre can be immense (top tip: get round the Louvre queues by going in via the Carrousel du Louvre shopping centre which is underneath the museum; it never has the lines the pyramid entrances have). Paris is so SO touristy, way more so than London. I think Notre Dame is dingy and overworked, it needs a good clean, stricter tourist control (they are so loud, despite signs asking people to keep their voices at a lower level, and camera flashes are always going off everywhere - I find it a bit disrespectful), and more investment.
But Paris also has such a magic. I can spend a whole day doing nothing but browsing in the bouquinistes along the Seine. I love exploring the little backstreets and finding proper French markets. Pere Lachaise is hauntingly beautiful. The Garnier is easily one of my most favourite buildings in the world. The architecture, the history, the art... It's just unparalleled. There's nothing better than getting up at 5am in the summer and cycling round before the traffic kicks in (get up early and cycle the wrong way around the Etoile 
). When it does you can get a fresh, hot pain au chocolat from a bakery.
Now if that's not your thing then fair enough, Paris isn't likely to hold much interest for you. If you want nightclubs, theme parks etc then it's not for you. It does help if you can speak French, at least enough to hold a small conversation. Forget trying to do the big attractions all in a week - you will become stressed and fed up of standing in lines. Find yourself a nice boulangerie and go and watch the world go by :)