A guitar that fights you — strings that hurt to press, notes that buzz, intonation that drifts so chords sound wrong up the neck — sends a lot of players shopping for a better instrument. They assume a nicer guitar will play better. Often it would, but for the wrong reason: the guitar they own is not actually bad, it just has never been set up. And a proper setup, which costs a fraction of a new guitar, fixes most of what they were trying to buy their way out of.
What a setup actually is
A setup is the adjustment of a guitar's playable details — the height of the strings above the fretboard, the neck's relief, the intonation that keeps it in tune up and down the neck, sometimes the nut and the frets. Guitars leave factories and shops in a generic, often poor state of adjustment, and they drift over time and with seasons. A guitar that is hard to play, buzzes, or will not stay in tune across the neck is very frequently just a guitar that needs these adjustments — not a guitar that needs replacing.
Why this gets missed
Because a setup is invisible and unglamorous, while a new guitar is exciting and tangible, and because beginners do not know setups exist or how much difference they make. So the natural response to a hard-to-play guitar is "I need a better guitar," and the cheap, dramatic fix — adjusting the one you have — never gets considered. The shop is happy to sell the upgrade; few mention the setup.
The takeaway
If your guitar is hard to play, buzzes, or will not stay in tune, get it set up before you conclude you need a new one. A good setup transforms playability for a small cost, and it can turn an instrument you were ready to replace into one you love. Buy a better guitar when you genuinely want a better guitar — not to solve a problem a setup would have fixed for far less.