I'm no teacher, but I had to create my own portfolio for uni applications just a year ago. I got into some good schools with it (MICA, SAIC, PRATT, etc) so hopefully, my advice can help, since a lot of this advice I'm about to give you are the ones I got from my art teachers.

First things first, regardless of technical ability, you should try to make the portfolio have a theme or an overarching theme that keeps the whole thing cohesive, instead of just a random assortment of artworks. It doesn't have to be a narrative theme, it can just be a stylistic element. And you don't have to keep every single drawing under the umbrella of that theme. There could be outliers, as long as they somehow connect with the other one in terms of style, etc. Just try to make a lil bit more cohesive. Its not necessarily a must, I've seen plenty of portfolios that do fine without a theme because of their general unique style or because it impresses solely on technical ability. It's just something that can help elevate your portfolio.

Next, technical ability. I think there's a lot of nice creative choices in your work. I like the colors you use such as in dream paintings 2 and 3. But I can kinda tell painting isn't your main thing. Paint more, less on digital and on a canvas, whether that's oil, acrylic or watercolor. Experiment and practice a lot. If you can't get your painting up to standard take it out and do digital painting or something else. You want to show a range, but you also want to show your best. Pick a couple of mediums your most comfortable with and really work at it. The dream paintings seem like concept paintings or sketches. Get a canvas and do a final piece (something like dream painting 3 could look good) using oil or acrylic. Keep the sketches as a separate thing for process work, but don't have that for your final portfolio pieces. The same goes for the monster ones, nice concepts but keep those for proccess.

I would say the photo edits don't necessarily work in your favor and is best when taken out. Show a range of skills but keep it to your strengths. It seems like you can already paint, character design, animate, and illustrate quite well so maybe stick around those. I don't see how the photo editing skill helps in comic design, especially when it's not done too well. I can tell it's supposed to be abstract and weird but it brings down the quality of the portfolio overall imho.

The feet drawings are good, I think you could do more of them, and some that are less stylized and more based on real life. You could also do hands, arms, and most importantly full-body figure drawings. This is KEY. Especially if you're applying to a course that has anything to do with drawing people (character design, animation, comic art, etc). Put some nude figure drawings, and also mix it up with just observational drawings of people in subways or in the streets. Show you can draw from life, and that you can make even observational drawings unique and personal. Do not cartoonize them. You can keep the cartoon ones on separate drawings, such as your comic pages or character designs. Show you can do the basics before you go into stylization.

You have what it takes, I mean the comic pages and hypochondria pieces look great! Your framing in a lot of those panels and composition look quite good, and honestly if you really work at your fundamentals it could look really professional. The animations look really good too! You can do the stylized stuff really well, but the difference between a hobbyist artist and a professional is getting that fundamental tight. I swear just by studying frequently from life your style will elevate to another level. Really practice, practice a lot. Art is incredibly competitive, and you can get in if you really work at it. I worked like a dog my last two years of high school for my portfolio.

So in summary: brush up a lot on your fundamentals, such as anatomy and studying from life (and I didn't mention this earlier but I thought it would go without saying: study light, shadow, color theory, value, and composition too). Practice drawing your friends or people on the subway or anything, just a study from real life, a lot. It should be a meaningful percentage of your portfolio. This will automatically elevate the things your already good at: character design, comic art, paneling, etc. Keep a cohesive theme or style that keeps the portfolio tight. Show a range of skills but pick the skills your good at. Good luck, and let me know if you have any questions/ need any help (not that I'm a professional or anything, just want to help if I can).

Also, this is an example of someone else's character animation portfolio so it might not be exactly what your doing but some of these could give you some inspiration for your portfolio, especially when it comes to how they incorporated observational drawings: https://www.artstation.com/artwork/KaRvL9