ES8000 firmware corrupted

[PowerGraphics]

My smartv ES8000 is very slow, even internet access is limited to 2 Mbps. Where I used to get 10 Mbps or more easily. Although my internet is 900 Mbps. But my TV has always limited access. The router has already been changed, I have already connected a router in bridge mode with the main one, and connected directly by cable to the TV, and the problem persists (checking that it is not the wifi module). Any device that has wifi (TV box, cell phone, etc.), the connection has no limits, no problems. It's really problem with the TV, maybe corrupted firmware. Some applications that worked fine before are now slow and some with a messy interface. Does anyone have any old firmware that I can do a regression on? Because the only firmware available from Samsung is the same as the TV, making reinstallation impossible.

My current Firmware: T-ECPUABC 1031.0

Thanks for any help!