DislikedOne of the reasons they get away with it is because they are very smart how they do it. Getting slipped to your detriment for example: if they slipped you on 100% of your trades, it would become obvious quickly and yes you would leave quickly. But what if they only slip you say 75% of the time? And what if the slips are only 1/2 of a pip? You might notice, but you'd probably think it was just your imagination, or "that's just trading", or whatever.
These people are not stupid; they aren't going to make it that obvious. They are very smart...Ignored
In your case, I am sure you pulled out long time ago and sought alternatives elsewhere and that is what I would imagine majority of traders would do, especially if they are not making any money from it anymore. I mean "slippages" happen all the time and to all brokers, but if it's to the point of not allowing one to make money, then one would've stopped and pulled out. Wouldn't you agree?
Make your losses in demo. Earn your profits live.