you are right. I was in the Bitdefender forum some hours ago and saw bad experiences in terms of performance I had some bugs with Bitdefender, slow internet, BSOD on my sister's laptop, problem with the internet download manager(this one was solved a long time ago but experienced guys know what I'm talking about) so even Bitdefender is a no go.
to be honest the first choice for everyone who's experienced is Kaspersky It is sad that this company is ahead of many others and the choices are getting narrower every day with this gen digital thing and others having problems. just look at what they are doing with their detection, and their remediation techniques, their cloud is powerful and the overall package is stable much fewer bugs.
the US ban makes things complicated, we people outside the US can use this but with stress!! I had it installed on my friends and family and some of my friend's business PCs and Macs.
there seem to be few other options than Kaspersky, gdata is good too seems they are a good alternative to Kaspesky even eset is good if you are not a happy clicker.