To disable wavy/squiggly underline in vscode, go to preferences and set underline color to fully transparent:
{
"workbench.colorCustomizations": {
"editorError.foreground": "#00000000",
"editorWarning.foreground": "#00000000",
"editorInfo.foreground": "#00000000"
}
}
Though it may be better to make underline color just less vibrant:
{
"workbench.colorCustomizations": {
"editorError.foreground": "#ff000088",
"editorWarning.foreground": "#ffe60033",
"editorInfo.foreground": "#00ff0088"
}
}