If our version had the glitz, glamour and in several cases, sex appeal of Dancing With The Stars franchises abroad, again I could take it.
But to be outdone by more than 2:1 against the very pedestrian and lethargic Strictly is just embarrassing.
I think you may be making the mistake of thinking that you can map DWTS into the UK - when the reality is that you can't. It's rare for a 'lift and shift' approach to work that well.
Strictly does so well here precisely because it knows its audience. The presentation is quirkier (the hosts on DWTS are instantly forgettable), the Strictly production values are higher in lots of ways (AFAIK DWTS still has no floor projection in their regular studio, just tired gobos, only gaining floor projection only when they move to the shows in a real ballroom, and DWTS has a massively cut-back live band these days)
Strictly has largely avoided quite such an overt 'something for the dads' approach that sometimes you feel impacts elements of DWTS, and the humour that permeates Strictly (from Claudia's 'so bad they're good gags' to the training VTs) really makes a difference. I suspect Strictly It Takes Two helps in generating some loyalty from the super fans too.
Strictly is getting higher ratings in the UK than DWTS in the US - even ignoring the huge population (~5x higher) difference...
DWTS ratings have gone from more than 27m for the final in its earlier days, to just over 8m (less than Strictly is getting for regular shows) - so whatever Strictly is doing is working far better. Regular editions of DWTS are now in the 6-7m range, not adjusted for the population difference...
Having watched a number of International versions - the DWTS, Let's Dance etc. variants - they all seem to be cheaper, with lower production values (small studios with far more basic lighting, and much more limited added production in terms of set and props) and far less concentration and care taken over the actual coverage of the dance. (Strictly still shows you a lot of feet so you can judge the footwork at home - lots of international versions appear to treat it more like a music show)