Have used the Ledger Nano S before and as far as the display is concerned, I can only agree with the OP. It is very cheaply produced and does not last long. After the display broke, I have no longer used a HW wallet.
You can easily order and replace that display yourself, order it online from from one many websites that sell them like
this one for example, and follow this
video instructions.
If you need any help you can write in this topic, and people will help you if you get stuck somewhere during this process.
Ledger should also release new device ledger nano s plus in 2022 and they improved display and made it bigger.
But I am about to buy a new HW wallet. What do you guys think is the best option right now? The software should be open source and the memory should be enough to manage at least 10 coins. Is Ledger Nano X a good option?
I would not suggesting anyone to waste money purchasing ledger nano X for several reasons, it's closed source, many people recently reported battery and firmware update issues.
More information about this can be found in my topic
Ledger Nano X Battery Pandemic.
My suggestion for everyone is to think about purchasing and supporting Open Source hardware wallets, or simply use offline computer with software wallet.
List of hardware wallets supporting more coins like you want:
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Trezor-
Bitbox-
Keystone[/size]