I think if the platform is unsettling to you and you see no hope that it will get better, you should leave.
I see it a bit differently. I see steemit as an opportunity to see a lot of different content and make contact with some great people. It is much like the pioneering days in America. Bear with me.
1: you stake your claim on here. Nobody competes for your spot.
2: you work your claim to make it more liveable and fertile through content posting
3: you continue to grow your stake and people start to notice and follow your work
4: reach out to your neighbors. Reaching out to others and following those whose content you enjoy will pay back dividends and increase your bandwidth.
5: keep plugging If you give up on working your stake, it will surely put out a bad crop, stay positive and post on. Find your niche and work it out. If you thought you could just plant a few seeds and get a huge crop, without any weeding or digging , try to grow something real with no attention paid.
6: yes there are bigger stakes being worked, yes, sometimes your neighbor will get a better crop even though it appears that he didn't till has land as well as you. Blaming them for your lack of success is not going to make you successful.

So, yes, if you do not wish to do the work to make your stake into a mega farm, you should leave steemit. I am in it for the long haul and I think I can succeed here. Maybe I am wrong, but, I rarely see successful people telling Forbes how little work they did to get to the top.
Those of us who choose to stay and work our stakes will not suffer if the lower vibration crowd just disappears. And you will not be missed.