Complex sentence: Because of Wally, Barry is now aware that the timeline is not reset correctly after Flashpoint and thus another alternate timeline, and despite being informed by Wally that another party is responsible, Barry remains in guilt over his mistakes.
Split into simpler sentences: Because of Wally, Barry is now aware that the timeline is not reset correctly after Flashpoint and thus another alternate timeline. Despite being informed by Wally that another party is responsible, Barry remains in guilt over his mistakes.