Then if wrong usage cannot blame the tires. The only real problem I see with Michelin is the chipping issue but that's not major. Nexen I've seen several times bulging despite proper usage. The bulging can be very slight almost not noticeable by eyes but when you touch the surface or drive it, then can feel it. So far only Hankook is really good for Korean brands, I personally wouldn't use those others like Kumho or Nexen.

When i bought Nexen tires they do have tire warranty, if it did not hit pot holes or got any punctured it can be claim within 1 year from my last purchase.
Usually they will sent for investigation of the tires like checking for sidewall crack or really their own problem.

BTW, the side minor bulging issue if not serious and only 1 place it is usually knew as tire sidewall indentation and it is usually harmless.
If found few place bulging and after do balancing still vibrate then it is tire problem.

Depending on your budget. If money is not an issue, going to premium brand like Michelin, Bridgestone, Pirelli, Goodyear is safer bet.

If want middle range, Falken, Hankook, Yokohama, Toyo, Maxxis is also few good brands to consider.

https://www.tyrereviews.com/Search/Size/175...4/Season/Summer

My personal recommendation, either Falken SN832 or Yokohama ES32 for the balance value + performance.

https://www.tyrereviews.com/Article/2018-AD...-175-65-R14.htm

Falken SN832 score 1st for 175/65/R14 tyre category base on the review test link above.

Tyre price nowadays price up a lot and not accurate depending on areas

If you want to know direct ask stamford tyres as they are the main distributor of Falken tyres in Malaysia.

https://www.stamfordtyres.com.my/retail-workshop/