Here's my $.02 being a Mac and PC user.
13in is way to small of a screen, 16in is better but its waaaayyyy overpriced.
Personal preference regarding sizes. I agree 13" is too small, and the 16" while larger is so much better on the eyes. Btw, I have a 14" and I'm struggling a bit with the smaller fonts. My kids love, absolutely love the 14"
As for the price, while expensive, and the apple tax is real, I do believe you get what you pay for. I own a Razer laptop and they're literally just as expensive as Macs. You want a beautifully designed, product using high end parts with unsurpassed quality - well then expect to pay top dollar.
I like my current 15in 2016 with the task bar, but the chip architecture can't support a browser with 80 tabs open on chrome.
Have you considered buying a 2020 MBP that is still on the intel platform, and the chipset/memory set up will give you what you want.
Let me also say that 80 tabs is simply too much, chrome and safari were not designed to easily work with so many tabs and streamlining your workflow to use less tabs may be beneficial for you both hardware wise but also efficiency wise.
Apple is always disappointing but what other choice do we have??
I have to disagree, while there have been times where I feel Apple laid an egg, i.e., butterfly keyboard, touch bar, they produce some really great products. I may be disappointed once in a while, and if you are ALWAYS disappointed then Apple products are not for you. For laptops, there are so many options available for you, Whether we're talking Razer, Asus, Lenovo. You can find a well built machine that has the specs at a price you're willing to pay. Granted you'll have to be using windows, or use Linux but that's what life is about - weighing the pros and cons for each decision ¯\_(ツ)_/¯
Good luck, but its not as bleak as you think it is. You do have options