Anything with an sfp slot and a decent "optic" should blow tp-link's link stability out of the water. In about the same price range, have you tried mikrotik?
That is one I have not tried. Looks like its HQ is in Latvia. The GPERx6 looks interesting. I might give them a try. That RDS2216 also looks interesting. 20 U.2 NVMe storage slots. Nice...
