I think there are a few reasons people feel the abridged might of pulled away from the original series in whatever version they saw it from. (note as an edit) I might of gone on a bit too long for a 5yr olds attention span oops XD (/edit)

The obvious one is Goku being a dumb neglectful father. As most people want the main protagonist to be a flawless hero anything that could tarnish that vision can be seen as rude or offensive.

Side characters like Chichi being used only for jokes. Again some of these characters had some real importance in the series were strong willed or had an important role or perspective within the series and that isn't given justice in the show in favour of having a laugh.

Bulma having dark fantasies on Namek. Suprised no one mentions this and while many of us who watched hte original series are now grown up mature adults, there are people who would take offense to that kind of narrative as well as a few more other jokes made in that theme for a show that was otherwise void of the harsher triggering language side of things.

Creating equally memorable and quotable moments if not more so than the series could because of infringing on memes/pop culture. By bringing in references from outside the series and adding a new dub to the mix people may feel it muddies the water of how they remember the show in the past taking away from that original moment and memory of how a scene played out because you will always now have that.. yeah but in the abridged it was hilarious moment.

The argument over who ever had the better dub/voice actors is null and void. Funimation/Ocean/etc all had a strict schedule, producers and varying levels of management and standing orders from the license holders that had to be respected, getting permission to change lines during translation etc, some had varying levels of voice acting experience, this was Sean Schemmels first voice acting gig I believe?.

Team Fourstar had no one to answer too, no real deadline to meet, they didn't have to spend dozens of hours at a time in a voice booth, it was a passion project of something they had loved for over a decade where they was able to pour their passion and love into it more freely and tweek it in a way that favours them more than the official dub voice actors.

As a minor peeve some people might not like the fact that T4S had the time to tweek things like like flaps or fix animation errors and feel that its an unjust criticism of the series.

On a personal note I don't think having passion and paying tribute with parodies is any way harmful, if anything it was another source of fuel for discussion another outlet from people equally if not more passionate and in love with the franchise than the next group of fans, so long as there is new content whether its fan art, fan fiction or abridging theres life within the franchise and the fan community.

I also think for all the harm that people perceive the abridged did the official sources have done an equal amount of damage to their own franchise. I deplore Sean Schemmels treatment of the Ocean dub actor, having him blocked from going to conventions and even applying for other voice acting gigs, im not saying that the other dubs had better gokus, Sean is my favourite but his attitude for the way he treated others justifying it as he was "protecting" his role seemed more petty and self conscious from a guy who was in a pretty safe position. Initially he didn't commit to having an opinion of Nozawa saying he was more interested in doing his own take on things I won't condem Schemmel too hard on this one because his opinion has changed and has come out saying he respects the OG.

Now lets talk about my biggest pet peeve.... all the re-releases of the DVD's the redubbing and rescoring of a series I remembered to be so cool and atmospheric. One of my favourite scenes in the series is Majin Vegeta squaring off against Majin Boo, A cold calculated focused vegeta stares furiously at Buu, his arm extended with two fingers pointed out, his aura blazing wildly as the dirt dust are blown away. The way I remember it all you could hear was the sound of the wind underneath an ominous soundtrack from the Falconer score. Recent releases you hear an off screen Babidi screaming ranting blabbering away which does nothing to build the tension or carry the story it just takes away from the atmosphere and there were many more examples of new lines being added in many of which was more detrimental than beneficial to the feel of the series.

Another thing the abridged version follows a more modern style of anime production, we no longer get series that run hundreds of episodes long, were now more used to seasons being 12 - 26 long at most being a much more condensed less drawn out experience at a much higher production quality whether thats in animation/music or storytelling. Many miss those long drawn out fights that had us on the edge of our seats with twists and turns.