Did I brick my ESP8266 ESP01 on Pico?

I realized that I was still using 0018000902-AI03 firmware, so I decided to update it. I made a mistake of doing it on Windows because esptool.py kept timing out. Then I read about --no-stub option and added that to my command. Reading/writing started to work, but got slower and slower and timed out before reaching even 20% of flashing. I finally realized that I could have flashed it through Raspberry Pi 3+, but even there it doesn't work without --no-stub and flashing fails anyways. Whats my options?

pi@raspberrypi:~ $ python -m esptool -p /dev/ttyACM0 -b 115200 --no-stub read_mac
esptool.py v2.8
Serial port /dev/ttyACM0
Connecting...
Detecting chip type... ESP8266
Chip is ESP8266EX
Features: WiFi
Crystal is 26MHz
MAC: 18:fe:34:9d:53:13
Enabling default SPI flash mode...
MAC: 18:fe:34:9d:53:13
Hard resetting via RTS pin...

pi@raspberrypi:~ $ python -m esptool -p /dev/ttyACM0 -b 115200 --no-stub write_flash 0 ESP8266_AT25-SDK112-512k.bin
esptool.py v2.8
Serial port /dev/ttyACM0
Connecting...
Detecting chip type... ESP8266
Chip is ESP8266EX
Features: WiFi
Crystal is 26MHz
MAC: 18:fe:34:9d:53:13
Enabling default SPI flash mode...
Configuring flash size...
Auto-detected Flash size: 512KB
Erasing flash...
Took 1.05s to erase flash block
Writing at 0x00000000... (0 %)
A fatal error occurred: Invalid head of packet (0x13)