My personal guideline for determining when I am nitpicking or have a valid complaint is really to assess how much I've been inconvenienced and how quickly management works to rectify the situation. If they seem to be giving it the old college try I am less likely to be annoyed than I am if it seems I am being ignored (like the time in an Orlando Marriott where we were given 3 pillows in a room they knew was occupied by 4 people, and it took 3 NIGHTS and numerous calls and visits to the front desk to finally get it right).

Similar to your situation, we were in a newer Marriott (also in Orlando) where the water was not usable for portions of 2 of our 5 days there. Upon bringing it to the attention of the management, we were comped two free nights (which I thought was extremely generous).

Having said all that, I will sheepishly admit that my husband has complained to the front desk over situations that were less of an inconvenience than those you describe