If at one point you supported him, it appears that you are ready to move on to someone else because you don't think he is fighting hard enough for you. There are plenty of good Democrats that run in every election.
While some may have encouraged Beto to run for another statewide race, there were also just as many people that were encouraging him to run for president. The conventional wisdom in the months following the 2018 election was that Cornyn was more popular than Cruz and that Beto wouldn't run as close of a race against Cornyn than he did with Cruz. The field of candidates for the Democratic presidential race was also smaller and it wasn't even known whether Biden would enter the race when Beto announced his campaign. Other candidates such as Bennet, Bloomberg, Bullock, Hickenlooper, Patrick and Steyer also had not entered the campaign.
Lamenting the fact that you disagreed with Beto's decisions in hindsight is your choice. You have every right to comment about Beto's choices on DU, but you shouldn't be surprised when other people disagree with your retroactive criticism.
Beto has made his decisions and there is nothing either of us can do to change his mind. While I'm disappointed that Beto won't be president, I always knew that his campaign was a longshot from the beginning and I will have to live with it. Meanwhile, you are disappointed that Beto didn't commit to running for Senate and you will have to live with that. I'm sorry that Beto didn't meet your expectations, but I admire how Beto has handled his campaign and his recent involvement in the "FLIP the House" movement with class. Beto is young and he still has a long political career ahead of him if he wants to pursue it. Whether you want to support him in the future is your choice, but as you said above, if Beto isn't committed to running for a specific race then he shouldn't enter it. That is exactly what Beto chose to do.
However, I do wonder whether you are equally disappointed with Wendy Davis because she decided not to run for Senate in either 2018 or 2020. Are you disappointed with her decisions also? What about Julian Castro--are you disappointed with his decisions to stay out of the Senate races in 2018 and 2020 also? I haven't read about your disappointment in their decisions even though they are in roughly equivalent scenarios as Beto, so your opinions about Beto do appear to be selective.
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