It started getting pretty formulaic, and some of the characters changed in ways that made no sense, Richard being the main one. Early on, he wasn't OK with paid users padding the usage metrics for Pied Piper and completely ruined Bachman's fundraising, but then like 2 seasons later he's totally OK installing software on everyone's phones at a tech conference? Totally inconsistent character development.
TJ Miller leaving was another huge setback for them, he really was the perfect foil for all of the characters around him.