While I agree with most criticisms to MikroTik (and I make my fair share of them often), I cannot see how setting up a linux box as a router can be faster than setting up a MikroTik. On a MikroTik and Winbox, with literally a few clicks you can start routing packets. With Debian (or any other distro) you have to type tons of commands until you can just do the basics. If you need more advanced stuff then it's loads more of typing.
Even having pre-made scripts that set up everything automatically, still cannot beat RouterOS in configuration time.
Having both configured via scripts, RouterOS will still be faster from boot to routing packets for the first time.
RouterOS would start routing packets before Debian had even booted its kernel. There's just no comparison.
I am not sure what your use-case is exactly, that you run on so many bugs that'll take you so much time to set up.
Probably it's lack of experience with the platform, rather than bugs and QC. There are bugs for sure, but routing works fine for the most part - especially for normal stuff. Really advanced/esoteric stuff will tend to bring out bugs, but normal use just works.
In regards to hardware, while I am not trying every single piece of MikroTik hardware anymore as much as I used to (especially anything related to wifi), the RB4011, RB5009, CCR line etc (ie just routers) work flawlessly, and I haven't had any issues with them (with hundreds of them - so a substantial sample size).
Many of them are placed in terrible environments (ie 60-70degrees ambient temps) - and still work after many years. Other vendors simply fail within a year in those environments, and those that have variants rated for harsh environments are on another league of their own cost-wise.
As a matter of fact, the quality on MikroTik hardware is substantially better than many other vendors out there - especially for how little they cost in comparison.
Some models may feel like plastic toys, sure, but they just work. For years on end without breaking ever.
Most failures I've had were with power supplies rather than the routers themselves.
Sure, there have been some models that had design flaws, but those were very few in the last 15 years I've been using MikroTik hardware.