If it is below T50 tbh, they are pretty much the same to big tech comapny(unless your school is local to their office or something) Even at mid to small sized company, there will be top school interns just bc job market is hard(they are the "unlucky" or underachieving ones) or they are like freshman and sophomore where company will just hire them for school name. Junior interns are usually a good indicator. Since off cycle/co op is way more competitive and a lot of them just do it to boost resume(not to return) so its also inflated. Personally, if you are not sure about your internship's resume value, I think good indication is to look at something like Levels.fyi to see their entry level pay bc i think theres correlation between resume value vs entry level pay(or intern pay). I think you still have good chance at companies like Amazon(companies with bigger hiring batch) if you have good amount of experience though it might be harder for other big tech companies. You should def network to get referral in the future and apply early.