I like the soundings in Windy (aka Aerology). But I see that you use only a reduced dataset to draw the soundings. The temperature curve is always straight lines between data points from "standard" pressure levels like 950, 925, 900. 850, 800, 700, 600 hpa... So this can be rather inaccurate, especially in times and locations where you get some low level inversions.
Isn't it possible to get a more high-res version of the soundings?
By the way: Looking at the soundings from ICON-D2, the data points seem to be thinned out even more, just showing 1000, 950, 850 hpa levels in the lower part. Why? In this form the ICON D2 sounding is useless, because you will miss most of the low inversions that will form at this time of the year (autumn).