Nope. While for most of the movie she isn't physically abusive, Gothel does raise more than a few flags in the emotional abuse department, consistently trying to undermine Rapunzel's self-confidence, trying her damnedest to make the her 'daughter' both physically and emotionally dependent on her, and far from above manipulation both with and without guilt-trips. This is at its most overt with the
Mother Knows Best song and its reprise. Much of the song is spent insulting Rapunzel on as many fronts as possible[footnote]She directly calls Rapunzel all of the following in the lyrics: fragile, little, pet, sloppy, under-dressed, immature, clumsy, gullible, naive, grubby, ditzy, and chubby[/footnote] while reinforcing her dependence on Gothel by presenting the latter as the only source of comfort and 'goodness' in the world...and she exploits this to further toy with, torment and ultimately shame her into agreeing as the song ends.
Then cue the reprise later on which is preceded by a bit about how 'Flynn' might like Rapunzel, leading to this gem of a line: "Likes you? Please Rapunzel, that's demented! This is why you never should have left! Dear, this whole romance that you have invented just proves you're too naĆÆve to be here. Why would he like you? Come on now, really? Look at you! You think that he's impressed?" This crosses well past the line of "this guy's a sleezeball" and is heavily implies that the fault is actually Rapunzel's, that the idea of anyone (other than Gothel) caring for Rapunzel was ludicrous. Does that sound like good parenting?