This is quite a big issue for me that I often think about and indeed may well have posted about before.
There are instances where something is very, very wrong and I feel somewhat bad about liking and yet at the same time, it is an occasional indulgence (a bit like sad songs I love but cannot ultimately consider first rate due to their nature...although not fully like that, because I feel no real guilt in such cases).
There are also instances where the creator of the "artform" is despicable in some way, and yet clearly not enough for me to distance myself from the art entirely (sometimes that can happen from simply not wanting to know any further, or because history makes details sketchy, or perhaps there are mitigating circumstances).
An example of something I should not like:
(this is absolutely vulgar, and could be considered extremely misogynistic,
so perhaps should not be watched):
It may be hard to try and persuade someone that this should be taken in the wider context of the whole film, and of Pete and Dud's earlier broadcastable material...how do you tell someone that you find this "sort of thing" amusing without them getting the wrong impression entirely? ...which would not necessarily be a wrong impression!
...this is the sort of "banter" that often goes on between people...privately (I've done it myself...)
These two weren't always good to their wives either, although I can't remember the details...