What are people's experiences with the fairphone (4) in regards to build quality?

Apologies, rant ahead of my frustrations with it

I bought mine second hand and had to replace the battery immediately (maybe previous owner treated it badly)

The mic stopped working recently, which I kind of fixed by taking it apart, cleaning it out and putting it all back together but it's still dodgey

Charger port no longer works without me jamming the charger in and holding it there

Also again from the start the actual horsepower behind it seems insufficient to run the version of android it came with smoothly sometimes, meaning at some point soon I'm going to have to replace it just so it can keep up.

It's great that I can fix these problems by getting replacement parts rather than replacing the whole phone, but it's getting expensive really quickly and I'm not sure I trust their build quality given how much has broken right off the bat