Shankar, room looks fine apart from the very ugly foam, which IMO is overdone.

There is an easy test to see if the room is over damped, walk into it while talking and if your voices still sounds natural to you, it's probably ok, if it seems to suck the life and become nasal, it's overdone.

However, you are complaining of boomyness without correction and reediness and shrillness with. That indicates there is very little wrong with mids and HF and it's the bass correction that is killing the sound.

It could be that the boom is masking an innate issue with upper mids and treble. You might have well overdamped the room in the HF as looking at the pics, especially the foam. All most of the treatments will do and absorb is upper HF. This will tend to accentuate freqs from 2k-8k - where shrillness resides...

The problem you could have moving the speakers nearer the wall is that it might improve bass but it might do you no favours when it comes to soundstage, mid/HF and imaging.

I think you manually need to build the filters in MRC, or as I said, whack in a "house curve" to compensate for the correction leaving you bass light, or to use a different form of correction.

I have never found in any of the systems that I have used, that auto correction works 100% without quite a bit of tweaking.

Of course, vital in ANY form of RC that relies on measurements, is the measurement itself.

Roon/Tidal, SBT, Trinnov ST2 , Twin Devialet D premiers, Vivid Audio Giya G1 Spirits, dedicated and treated room.
Meridian gear: 568.2mm and DSP5000's acting as TV speakers.