In September 2023, Unity announced a per-install runtime fee that caused massive developer backlash. Over 1,000 indie developers signed protest letters. Though reversed in 2024, many developers lost trust in Unity's management and began exploring alternatives. The damage to Unity's reputation persists.

Unity Pro rose 8% in 2025 (from $2,040 to $2,200/year) and another 5% in 2026 (to $2,310/year). Enterprise increased 25%. These continuous price increases frustrate developers, especially since the runtime fee reversal was accompanied by price hikes. Many feel they're paying more for an engine that lost their trust.

The Asset Store contains many low-quality or abandoned assets alongside good ones. Developers waste money on assets that don't work as advertised or aren't updated for new Unity versions. Plugin compatibility issues are common.

Users report waiting weeks for responses from Unity's customer support team. Some issues go unresolved for months. The support experience is described as poor, with users often relying on community forums instead of official channels.

Unity becomes sluggish, bloated, and glitchy as projects grow. Editor performance drops, compilation times increase, and the software feels increasingly heavy. Users describe it as bloated compared to alternatives like Godot.

Unity version updates frequently cause compatibility problems with existing projects and plugins. Assets break, workflows change unexpectedly, and developers spend significant time fixing issues after updates. Version management is confusing and disruptive.

Users describe working with Unity as 'feeling like a gamble' due to unpredictable licensing changes, feature removals, and pricing shifts. The company's bad decision-making about licensing terms creates an unstable development environment.

Unity's visual quality doesn't match Unreal Engine's photorealism, even with HDRP. Users expecting AAA-quality graphics find Unity falls short. For photorealistic games, Unity requires more manual optimization and still doesn't match UE5's Nanite/Lumen.

Starting with Unity 6.3, Havok Physics is no longer included with Pro, Enterprise, or Industry subscriptions. Users who relied on this feature now face additional costs or must migrate to alternatives. Feature removals erode subscription value.

Unity's reliance on binary files makes version control difficult with Git. Merge conflicts are common and hard to resolve. Unity's own packages intended to help have had limited success. Teams struggle with collaboration compared to text-based alternatives.

Developers report frequent issues when building for iOS, particularly with plugins clashing and causing duplicate library problems. Asset Store plugins often conflict with each other, requiring significant debugging time.

While marketed as beginner-friendly, Unity's learning curve far exceeds initial expectations. New terminology, C#, built-in methods, and cross-platform builds create significant complexity. Becoming professional takes nearly a year or more.

While Unity is popular for mobile, achieving good performance requires extensive optimization work. Garbage collection pauses, draw call management, and memory constraints demand careful attention. Mobile builds are larger than native alternatives.