I also had issues with mine so upgraded to Osram Nightbreakers. I'm not entirely convinced they were worth the cost but I would say they helped. This main issue I have is the range rather than the overall brightness. My partner has a 2017 Cooper S and the headlights on that thing are like two very small but intense suns mounted to the car. I suspect there is a small generator powering them, likely fusion.
I fitted them myself which was quite the job in itself, there's a few bolts that are hard to reach with conventional tools so I had to improvise. Taking the bumper off partially was my approach and it's the first time I've ever done it, I was very surprised at just how much force needed to actually get it to unclip after all of the screws and bolts were removed.
I'd say the best thing to do first is raise your current ones to the absolute highest they can (within the legal limit, naturally) and then go from there.