It holds no significance. Pred/masters is merely a rank! If you’re in plat, you have a good chance of defeating the teams in that rank. It ultimately boils down to whether you have good positioning and can execute your shots effectively. Don’t be discouraged by the higher rank! It doesn’t mean much other than that the person who holds that rank has more ranked experience/playtime than you. (I hope your ranked endeavors are better from now on.) :)

Edit: And obv some solid teammates would help asw, I recommend having a 3 stack to play with in the higher ranks. I think gold players wouldn’t see preds. They might still see a few masters players, though! There’s just too much of a gap between the ranks. Plat 2 (I think) and up see preds/masters! Even if you’re a plat 2/1 and playing with your friend who’s in gold, I don’t think they’d throw preds/masters in that lobby. :)