shift key not working consistently in Mechanical keyboards
So a year ago I got a redragon kumara k552 which is a 30 dollar keyboard, but after sometime, I noticed that the shift key isn't working consistently, it doesn't register sometimes when I press it, and it's annoying as heck. So I got myself another redragon keyboard (fizz k617) and after 2 weeks it began to do the same, and it gets worse everyday, I know it's probably the stabilizers but my friend had the same keyboard and multiple keys had the same issue including no stabilizer keys.I'm gonna refund this keyboard but I don't know what keyboard is good, I'm looking for a good 30 dollar hotswappable (with rgb preferably) any suggestions?
Also is this issue common in all mechanical keyboards or is it just for dragon keyboards?