You misunderstand.
When NE was good, they were
actually good, so trash talk at that time was warranted.
The Josh Allen Bills are frauds who
also have not won anything. Their fans bragging about division titles is no less pathetic than this:

Now, were the Dolphins an "AFC Finalist" any time in the last 30 years? No.
But I can still laugh at the Colts for being proud of that pitiful banner.
You and I can somewhat agree here. I wouldn't say anything about them having a division winner banner but putting one up celebrating a conference loss is pathetic.