Simex is possibly a scam site. I have seen some more complaint against this site. So, of course, they are doing shaddy job. I would never use an exchange before researching.
Why the heck someone will use noob exchange? We have tons of huge sites so I won't even bother to use those never heard ones. So far, I don't encounter worst exchange nor service, maybe because of I'm very picky in using and don't want to risk my money.
But seriously, I hate doing kyc. It sucks.
I dont know why there are really people who do loves to use up some exchange and same as you said there are lots of options to go with the reputable ones.
If you dont like to experience possible problems you can always choose up with those exchange rather than on risking your assets with unknown ones.
The chance of losing it is surely high since they arent popular yet nor have that reputation.