RSUs aren't really that bad, unless your employer does sell to cover in annoying ways. Net share withholding works out super simple, the shares that weren't withheld are at the brokerage with the correct basis, and the income and withholding are reported accurately on your w-2.
Options do get pretty nasty if you exercise and hold, when the fair market value is higher than the fair market value; because then you have to have an AMT return and a regular return and reconcile them.
ESPP with a discount was pretty bad the last time I had it; the brokerage said they were specifically required by IRS rules to report the wrong cost basis, and you had to adjust it when you sold, or you'd have the discount reported on your w-2 and again as a capital gain. Maybe that changed, capital gains reporting has changed over time.
Options do get pretty nasty if you exercise and hold, when the fair market value is higher than the fair market value; because then you have to have an AMT return and a regular return and reconcile them.
ESPP with a discount was pretty bad the last time I had it; the brokerage said they were specifically required by IRS rules to report the wrong cost basis, and you had to adjust it when you sold, or you'd have the discount reported on your w-2 and again as a capital gain. Maybe that changed, capital gains reporting has changed over time.