Could it possible be that maybe you're simply a Gold Level Player at this point in time?
That the improved competition you are facing in Gold is more your equal, where the lesser competition of Bronze and Silver weren't strong enough to hold you back?
Just because it only took you say 3 Weeks to climb from Bronze to Silver doesn't mean it should take you only 3 Weeks for each segment after.
Also, you seem to be doing well enough to not get Relegated DOWN... it more than likely seems that you are Gold Talent (which isn't a bad thing). And if you have 'forgotten' how to Win, then why in the world should you be able to advance in that state? Figure it out again... you have once before.
Don't let hitting a wall end your journey... if it was easy you wouldn't want it.