Hahaha, YES!!! You've hit the plateau, you're at the point where you love BJJ so much that you HATE it... This is a GREAT thing.
You'll go through phases where the guys you were smoking all of a sudden start beating you.... The things you could set up and catch with ease, all of a sudden stop working.... And you will feel like you're in a hole..... Stay at it, but don't frustrate yourself, these moments are good for you, stay your course, and I guarantee the best results will happen.... Why? Two reasons, first, people naturally get better and harder to catch, and second, you're not doing anything that they don't expect of you..... So now, you implement new areas of your game..... Drill drill drill new stuff, work on what you feel is a weakness, work on all your defense and transitions, work on your guard passing...... You've done this enough, like I tell my team, the hardest part in competition is takedowns and guard passing (so don't get discouraged).
Don't beat yourself up over it, you need these moments, and know that if you don't get frustrated and want to quick at least 2 times a year, you're not training hard enough LOL