Things Every Homeowner Knows About Hiring HVAC Companies: It's about rust... 3 year old system

Hi. This is unrelated but please help. It's about rust... 3 year old system, when installed they botched it not one, two, three, but four times so I'm a bit eerie. I noticed rusty water from the condensate drain, I checked the line and reviewed installation instructions from OEM website (Aspen coil). Pitch and p trap were not enough, so I fixed that, but I also noticed the (horizontal) evaporator coil case had almost no pitch toward the drain which I will fix, but I decided to remove the cover to take a look. The lack of pitch is causing water to remain right under the coil and fins, and rust. I wonder if there should be a clearance between the coil itself and the drain pan to allow water to flow underneath at the end of the ">", and also why evaporator coils, being that heavy, have no support underneath the casing. With the coil resting right on top of the plastic pan, the weight sinks in creating a lag and a puddle, which the pitch will not correct to allow all the water to run out the drain. Is this OK? Design flaw? Is it okay to install some support under the evaporator casing to reinforce and straighten it up and avoid the water build up and rust? Please advise.

"There is a problem for every solution":Faint:

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