Your issue isn’t with the Razer, it’s with the switch type.
For fast-paced FPS games, the red keys (or in this case, the Razer light and clicky optical switch), which require less force to actuate, are better.
With these switches, it’s easy to make fast movements, but it’s also easy to double type and to also inadvertently press keys.
For MMO games (and incidentally, typing in general), your typical blue or brown switches are going to be better.
I prefer brown switches. They take much more deliberate action to actuate, and as such, are much less likely to result in double typing/errors.
They also have enough tactile and audio feedback to signal to your mind that you’ve actuated the keys, but aren’t so obnoxious like blues, and tend to be a little easier on my arthritis.
I am using a Razer Black Widow TE (Tenkeyless) with brown keys. It’s precise, high quality construction, and is fast enough for gaming.
I also used some Logitech keyboards, such as the G413 and G613 with Romer G keys, which are a little closer to rubber dome but also decent.
There’s tons of different brands of keyboards, but the switch type is going to be the bigger determining factor, then quality of built, then features, etc.