Refining the Angular client part

Hello, there. Remote work on the site. The site needs to be reworked. You need to correct the errors of the site, which was presented by programmers not clean on hand. Unfortunately, they got caught up in fraud. The main problem with the placement of ads is now on the site. For a very long time (1-2-3 minutes) load ads with pictures larger than 1 MB. Since all phones now take at least 5MB photos, the way we advertise via the phone (as the main one we’re considering) is almost unacceptable. While on the page edit the ad, photos are quickly loaded. The server part is on asp.net, it has been edited. If the result is positive, there will be more tasks on the site. Thank you.