Earlier quoted context omitted.
Honestly, I've always found CRA friendly, competent, and responsive. But, I also don't run a small business, and am just a tax payer. Though when I had a small consultancy and corporation they were also actually fine to deal with.
Do you have kids? If so, did you try to deduct extracurricular activities? I did and was audited, also 100% of my friends were audited for the kids related deductions. Anecdata of course. Also I find Canadian personal taxes are way too complicated. I can think only of Italy where allegedly personal taxes even more complex.
I seem to recall from the last 4 or 5 filings that those deductions are gone now. The only thing I had to do each year was figure out the capital gains on my RSUs (in USD, so a bit fiddly). And now this year I have nothing like that, so it's just "here's my RRSP contributions, and yes, those T4s look like mine, confirmed, ok bye"