What job you do determines how soon your clothes wear out. My graphic designer friend tended to wear out the elbows in her sweaters because she rested her arms on the arms of her computer chair.
All clothes benefit from care. I hang to dry my riding shirts and breeches as well as my button up shirts and any t shirt I value, also any washable pant unless I’m trying to shrink jeans. I handwash sweaters and dry flat. I only dry clean my woolen blazers and pants once a year if needed. I hang them after wear and they keep their shape.
I bought all my work clothes on deep discount mostly Banana Republic season end sales, and the cost of dry cleaning them annually is much less than buying new crap clothes every few years over 15 or 20 years.
You do have to experiment with different pant styles. If you like how you look in jeans, dress pants, suit pants, or even khakis can feel shlubby and uncool by comparison. You have to get over that.
Fit is really important if you want to look put together.
And yes. Dressing nicely is a skill. Looking after quality clothes is a skill. They aren’t that difficult but they require enthusiasm. If you resent the very idea of dressing nice or spending one iota of time thinking about the concept or have given up in advance, which is not uncommon, you won’t be able to do it.
Even men have to learn these skills as they move into the professional workforce. There is much less complexity in menswear but they still need to know their measurements, find things that fit, press or have pressed their shirts, figure out how to choose and knot a tie, etc.
If you’ve been living a very outdoors horsey life, or an at home life, or a student life, or doing manual labor, or wearing a uniform, or you don’t love your body and looks, it can be very offputting to have to suddenly dress more formally and easy to give up or resent the process and insist it happen with no investment of time or money or thought from yourself.
But that’s not realistic. Developing a wardrobe takes some thought effort and creativity. There are currently fantastic videos on Youtube about dressing for every age group body type occasion. They are worth watching to see what you like, and how the presenters think about putting an outfit together.