I too tried to figure out all those fleets and patterns at first, but quickly realized it was more hassle than fun. In the end I decided to treat skins as a nice bonus, not a source of headaches. If skins suddenly become superfluous, there is an opportunity to sell CS2 skins through https://skinswap.com/sell, and do it literally in a couple of minutes. This way you can keep only those items that you like, and do not bother with the market. This option is ideal for those who play for fun.