I think we need to remember it was set in the 80's and early 90's. Being gay, for many, was just not understandable. Some families did react terribly when realising their child or other relative was gay. Add in the terror that was aids and gay people were treated like dirty lepers.
I thought the portrayal of less than perfect characters made it the program it is. The torment of Ritchies mum - someone who was battling with not only the fact her son was gay, but also was dying was real. We might look back now at that character and think "what a bitch" but we are in different times. Her emotions were complex and raw. I thought keely hawes played the part very well.
Ritchie himself wasn't a particularly likeable character but the journey from him getting to know uni and being able to explore his sexuality and his own demons with getting tested and discovering he had aids was raw and emotional.
All of the characters who died were so different and each had their own story. All heartbreaking.
We can look back now and realise exactly how awful they were treated but at the time the fear of getting aids was awful. Like or loath princess Diana, but she did so much good in starting to remove the worry aids could be caught by touch etc.
I watched it last year , and although very different diseases, could easily draw parallels with how covid patients were treated in the beginning. People being left to die alone etc.