As of right now I would say you have negative pressure, which will accumulate dust faster than if you had neutral or positive case pressure. I would try to mount the 140mm elsewhere as an intake to achieve a more balanced pressure. Or just remove the 140mm all together and just have to 200 intake and h100i as outake
that would be best. just dont buy a fan thats less than $10. i bought 4 cheap fans and they all had bad bearings within a year and a half, and one went before 6 months.