You definitely needs to calibrate your estep and flow rate as others mentioned. If numbers were correct then you might have a partial clog. If so, clean it and check Luke’s hotend fix on thingiverse/printable (really worth it). m.youtube.com/watch?v=7tCxO17XZtw

Under extrusion aside, you can get better text details by using a smaller nozzle as one issue for the text clarity is line width, while it isn’t ideal you can also try to set 0.30/0.35 line width with 0.4 nozzle.

Also, if you do plug in usb from your computer to printer (to calibrate estep), make sure to cover the 5v pin on usb cable with electrical tape. Otherwise you might wreck your printer mainboard. community.octoprint.org/t/…/13574