Build quality is very premium in all Android Flagships. Everything is there such as looks, gorilla glass victus, good weight balance, sleek bezels etc. If you just want a phone and can tolerate iOS then pick any random iPhone which is the least expensive.
People buy flagships for performance, cameras and experience. Build quality is not an issue with any flagship phone these days and the value for money is great in Flagships in Android world.
For example, I have a Xiaomi 13 pro, it has the latest 8+ gen 2 processor, it is butter smooth in everything. Fast, responsive, great cameras, premium looks everything is there. It's thermal management is also great. It gets less hot and can keep its screen at very high brightness in bright sunlight for a longer duration as compared to iPhone 14 pro. It also scores more in graphics stability tests because of this.
All this when some consider Xiaomi a non flagship worthy brand.
If you pick Samsung then you will get all this but also outstanding service. Android flagships are very good in everything so you can pick one with confidence.