Many photographers attribute disappointing photos to camera limitations and look toward an upgrade, when the actual limiting factor is more often composition and light, which no camera upgrade fixes directly.
Modern cameras across a wide price range are technically capable of excellent image quality under good light and competent technique — the gap between an entry-level and professional camera matters far less for most everyday photography than the gap between strong and weak composition.
Composition fundamentals — leading lines, the rule of thirds as a flexible starting guideline rather than a rigid rule, and paying deliberate attention to what is in the background, not just the subject — improve photos regardless of which camera captures them.
A genuinely useful exercise: revisit a set of disappointing photos and ask specifically whether the issue was composition, light, or focus — rather than camera capability — before attributing the result to equipment limitations.