Iran only started making their own air defense systems like a decade ago. And much of it seems based on Chinese technology.
The thing about this post is that the same thing happen to China semiconductor industry. That ingrained idea in the Chinese industry of that "renting is better than building", "foreign is better than domestic" is what stifled China semiconductor and IT industry for almost two decades and leaving it vulnerable to crippling export controls and sanctions.
The systems don't look bad on paper. Where they may lack is in networking capability and numbers.
But Iran is a large mountainous country. So expecting ground based SAMs to provide perfect coverage is too much. You run into all sorts of line of sight issues.
They need airborne radar and modern interceptor aircraft to plug gaps in coverage.