Man I really feel you, being a solo founder is tough. If it's possible for you to relocate temporarily Antler has a accelerator-esque program. They'll pay you a tiny stipend to move to Austin or NYC depending on which location you get into, for the duration of the program (5-6 weeks). You'll have like minded people around you giving you an opportunity to maybe find a co founder and get some motivation.

At the end you'll get a chance to pitch and get 100+k(varies by location) in seed and then another shot at getting funding.

Tbh their deal is doodoo compared to YC but it's a lot less competitive and you'll be out of the rut you're in right now.

As for the MVP taking time... I think it's perfectly fine, probably better even. The bar to impress it's very high now, specially since llms have made it pretty easy to add polish. I completely understand that feeling where you've already whittled your idea down to it's bone but you still can't get it done. That happens, I've faced that same problem numerous times. Whenever we thought we'd done enough we'd go out to testers and they'd point out the exact rough edges we'd intentionally tried to ignore to ship it out faster. Most of the time those edges put off people completely.

All you need to know is your target audience. If it's enterprise, having that added polish will make or break your deal if they're larger companies, specifically when they're customer 1-2. What won't matter is having 1-2 more metrics in a dashboard or maybe a customizable layout. But let's say you're report generation is a csv file that's generated client side with nothing asynchronous or email based, that would raise some eyebrows about the expected quality of service. This isn't to say you won't have understanding and patient customers, however you'll always have to earn it first.

Get the basics right, make sure it's all functioning together well and hopefully it'll all go well. The hardest part is always bd, that's where you'll truly start to feel like Will Smith walking around with your bone density scanner.