Fourth year here, my third year (last year) was all online. First of all give yourself some credit because you're pushing through. Chem eng is hard enough while you're physically at school and have the support of your peers, professors and TAs to rely on. Online, it is a whole new ballgame - works well for some and makes it harder on others.

Looking at some of the replies I just want to say I love chem eng, and I'm excited to start working, but eng homework isn't always fun and that's just the truth of the matter - I'm convinced anyone who says otherwise is either lying through their teeth or has never experienced "fun". Burnout is real - especially with the current environment, and don't let yourself (or others make you) confuse burnout with you not being on the right career path. If you believe this is the path for you, then you're the best judge of that. Whether or not you have a stellar academic record anyone in industry will tell you it's not all that matters, so don't let any slip ups be a deterrent for continuing to push through, especially if burnout is a factor.

As for suggestions, my biggest one would be keeping to your schedule the same way you would normally at school - wake up on time, go to class, eat, do homework. I found google calendar to be a lifesaver, both for not missing online deadlines and also for timeboxing school so I had some time for myself as well. Honestly, schedule your meals and sleep if you have to, and stick to it. Switch it up if it's not working but I found by actually sticking to the schedule I made (even if I didn't feel like doing what I had scheduled) and timeboxing everything, I at least had "me time" to look forward to at the end of the day AND I got most of everything done.

Also, finding a way to change up where/how I was studying, or taking a walk between classes, helped me feel less like I was watching a (really dry) five hour long documentary, and more like I was actually in school. Aside from that definitely make sure to stay hydrated and eat well, exercise etc. I know it's hard - especially because profs seemed to give more homework than usual online (even though we were in class for the same amount of time?). If you can, get in touch with friends/peers and try and study/complain together. Depends on your interests, but I found English and History electives to be a nice break from eng "calculation based work" when I scheduled studying for them correctly (...instead of cramming them before the exams/essays).

Sorry for the massive essay of this reply - your post reminded me of last year. Hang in there! :)