Ender 3 V2 - Melted areas on the top of the first mm of layers - extreme jagged edges

[whyzerman]

Dear community. Can please somebody give me a tip what to try to remediate melting on top of the bottom layers of my PLA prints - screenshots attached. It is especially visible on the bigger flat surfaces. I managed to significantly reduce jaggedness by online tips, but this melting is driving me crazy. I tried levelling the bed with regular A4 sheet of paper several times (I know it is probably not ideal) - the screenshot of the Cura test is attached (not ideal as well). The temperature of the bed is 55, hotend 205. Thanks in advance.