That's a rather confusing set of statements.
Many modern fonts are designed to be displayed with ClearType enabled. Some of these newer fonts look terrible without it, and they are designed to take advantage of different sub-pixel layouts at sizes between 8 point and 12 point. I love the look of the Consolas font, but only with ClearType enabled. While I was working on my book the publisher required all screenshots to be taken with it disabled, the font looked much worse with ClearType disabled.
ClearType lets you make adjustments, some of them are based on what looks better to you. The adjustments account for things like sub-pixel placement on LCD screens that can change with different orientations; for example if your monitor is rotated a quarter turn the sub-pixel antialiasing can be improved. It has a potentially bad side effect of coloring the edges of fonts so other of the adjustments let you adjust color intensity and bleed and other values.
Arial and other variable width fonts are typically a bad choice for editing code. Normally it is easier to read code if it is fixed width or nearly so, otherwise blocks of text tend to look wrong. If it works for you then go for it, but it isn't what most programmers would select.
Your "nope" line looks like you started doing something on your own, changed a setting, then complained about it here expecting us to know or see the difference. We are not mind readers. We cannot say why you "cant read that text to well ???? man." without a screenshot or other effective communication.