BOO to all those who've said things along the lines of the post below. Lots of you have said it, but I've copied n pasted Seniorcitizen1's post because it does it so succinctly:
You should let her train but not play - as organised league then the need of the team to win takes precedence over her being upset, she’s an adult and will get over it.
Seriously a 
to everyone who's said anything on that theme from me. What a horrible attitude! What the fuck does it REALLY matter? Of COURSE it's nice to win. But does it REALLY matter? Of course it doesn't.
Also, (as I know, because DD has been playing netball for 9 years now), a newly formed team often loses. Week after week. It IS depressing (try being the parent standing on the sidelines, in the pissing cold, trying desperately to find something encouraging to say after YET ANOTHER week of 22 - 8). But then, when you've played together for a while, it starts turning round. It just DOES. Maybe there's another team coming along which is newly formed with a crap player? Who knows. It just does start improving.
Netball (in particular) is a TEAM sport. There was 1 week when DD had to "play up" (with a higher league team which - due to her age, etc) she should have been playing in, but she wasn't. She had a year in a lower league team than she should have been in (a thread in itself, for me). She was initially really excited, but then shit scared. And I said to her, "DD, this is a TEAM sport. If the score ends up being 99 - 0, it absolutely CAN NOT be totally your fault, because each player has their own responsibility, so EVEN if you fuck up completely, in can NOT be just down to you.
PortiaCastis I totally agree with you - Lonely folk are advised to get out meet people join a club play a sport and this is the sort of thing that stops them.
I'm not lonely, but I am a bigger lady, and I hesitate from joining groups because of how I look and how fit I therefore am. Being "benched" for being fat would destroy me. Hence, I don't play netball or any team sport. Instead, I go to exercise classes, where it's just an individual thing and I don't bother or upset anyone with how rubbish I am!
Witchend, I do (however), "get" what you're saying. But I would point out that you're talking about tennis which is either 1 on 1 or 2 on 2. NETBALL has 7 players on the pitch, and they all have different roles. So if, (for example) your goal keeper is shit, and lets every ball in; you can still win the game if you have a fantastic shooter who never misses, particularly if you have a good attack side (to get the ball up to the shooter) and a good defence side (who stop the ball getting down to their shooter). Also, there are 2 goal keepers and shooters on each team.
So although I DO get your post, i'd politely point out it doesn't really apply to netball.
I find the OP mean, and I absolutely say I think she is U.
Also, I notice OP hasn't been back for a while.... ??? Maybe she's off, conquering the world at netball!