I would say Boeing and they have had a lot of crashes between their aircraft, especially the B747 and B737. It is still worrying for most people. I don’t care, I like Boeing.
Airbus is okay but they have had a lot of accidents in the past in their A300, A310, A320 A330, A340 and A400M Aeroplanes. But all of their aeroplanes are of highest quality.
But as @LSZH34 states:
Its rarely manufacturer related. It’s mainly revolving around the airline in general. But in some cases manufacturer problems can cause issues, like with TK981, AA96, UA811 and many more.
In my opinion, both manufacture great aircraft, but hey, accidents happen. It can be very aggravating for us enthusiasts when people state and quote:
“I don’t like the B777 because it might go missing or it might crash”
I have flew on lots of aeroplanes, and like all of them. I’ve even flown on a TU154. But some people think because of how common aeroplanes crash, its a case of I don’t want to fly on it.
That said, I think I have explained a lot. lol.