Astronomical seeing severely limits the efficacy of even multi-million dollar telescopes. The size of the pixels in this image is ~0.2 arcseconds, which is far below typical seeing limits even in excellent conditions.
My setup gives me around 1.92 arc seconds for a point diameter.
It's hard to do dim objects because there's less for the software to inspect in each frame to determine the luckiness and distortion, but you can maybe use fortuitous bright stars in the frame to index off. You also need to collect a huge number of images to get any sort of signal to noise ratio. This video is an example of the technique actually used on a dim object, though the results were fairly modest because of murky British skies.
- https://www.ing.iac.es/astronomy/development/hap/dimm.html
- https://www.researchgate.net/figure/Fig-C1-Seeing-distributi...
- https://www.mdpi.com/2072-4292/15/9/2225
Around 1-2 arcseconds is 'good' seeing in your backyard. There is a good reason for telescopes to be on some of the tallest mountains on Earth.