In recent years, new leadership at Twitter has made substantive changes that have resulted in increases in the prevalence of pseudoscience, conspiracy theory, and harassment on the platform
changes to Twitter have made the social media platform no longer professionally useful or pleasant
I think we need to be honest that - while there is some truth there - this is the view from elements of the left who were instrumental in suppressing conservative voices and generally making it an unpleasant environment for people who did not subscribe to modish cultural takes under the previous management.
The alternative view is of course that for good or ill, freedom of speech is a much higher priority now - which you would think is more in tune with scientific and rational enquiry.
None of that is mentioned in the abstract which immediately suggests caution should be taken when evaluating this study.
You are claiming that elements of the left harassed conservative voices on the platform, which agrees completely with the point to are attempting to discredit. The sort of harassment that can only occur by placing a high priority on freedom of speech. It is hard to have a professional discussion with angry people shouting at you, no matter your ideology.
You misquote me. I said "suppressing" not "harassed". I disagree strongly with both, but it is the former that is incompatible with free speech; the latter exploits it.