are there any risks of the hardware wallets being bugged so they can steal funds later from all users?
Software gets bugged all the time. It is to be expected. Bugged in a way that hackers can steal your funds though? I don't think so. As long as your 24 word seed is secure, hidden from plain sight, and stored non-digitally, it's probably next to impossible for your funds to be stolen.
Personally use it and have no complaints so far. Not sure why there are so many complaints on Reddit though...
I've owned 2 Ledger Nano S's for more than 2 years already and almost never had a problem besides some small minor stuff like Ledger Live displaying inaccurate bitcoin prices. It still boggles me how people on Reddit are for some reason messing up their devices LOL.