If you can upload the crash logs, that'd help determine what's going on.
Also, are you running the latest Java 8, and not Java 9 or later? Is it 64-bit? How much memory (min and max) have you allocated? Any difference if you direct connect to rev.lolnet.co.nz, instead of play.lolnet.co.nz?
i will boot it up again and work out how to post a crash log, im running latest Java 8 64 bit, ive allocated 2gb - 4gb ram, i did try both direct connect and through the server listed in the launcher (assuming thats play.lolnet)